# Questions on Algebra: Probability and statistics answered by real tutors!

Algebra ->  Algebra  -> Probability-and-statistics -> Questions on Algebra: Probability and statistics answered by real tutors!      Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

 Algebra: Probability and statistics Solvers Lessons Answers archive Quiz In Depth

 Question 349070: Column1 Column 2 Total row 1 53 row 2 26 row 3 21 total 36 64 100 In the table above, each of the six empty boxes should contain a number entry so that the column and row totals are as given. Juan wants to complete the table. What is the least number of entries that he must ask for in order to complete the table? (A) One (B) Two (C) Three (D) Four (E) Six Click here to see answer by stanbon(57422)

 Question 349135: A market analyst is hired to provide information on the type of customers who shop at a particular store. A random survey is taken of 100 shoppers at this store. Of these 100, 73 are women. The shoppers are grouped in three age categories, under 30, 30 up to 50 and 50 and over. The data is summarized in the table. Women Men Total Under 30 30 8 38 30 to 50 25 14 39 50 & over 18 5 23 Totals 73 27 100 Let W be the event that a randomly selected shopper is a woman. Let A be the event that a randomly selected shopper is under 30. a. Find the probability of W. b. Find the probability of A. c. Find the probability of A and W. d. Find the probability of A or W. e. Find the probability of A given W. Click here to see answer by stanbon(57422)

 Question 349186: Assume that births are distributed evenly over the seven days of the week. If you ask 3 men to state the day of the week they were born, what is the probability that all three were born on a Wednesday? I can not figure this out can some one help me and show me how to get the correct answer.... Thank you! Click here to see answer by vleith(2825)
 Question 349186: Assume that births are distributed evenly over the seven days of the week. If you ask 3 men to state the day of the week they were born, what is the probability that all three were born on a Wednesday? I can not figure this out can some one help me and show me how to get the correct answer.... Thank you! Click here to see answer by stanbon(57422)

 Question 349170: Intersection and conditional probability Suppose that a certain college class contains 64 students. Of these,35 are juniors, 34 are history majors, and 9 are neither. A student is selected at random from the class. (a) What is the probability that the student is both a junior and a history major? (b) Given that the student selected is a history major, what is the probability that she is also a junior? Click here to see answer by stanbon(57422)

 Question 349193: Assume that births are distributed evenly over the seven days of the week. If you ask 3 men to state the day of the week they were born, what is the probability that none of the three men were born on a Wednesday? Click here to see answer by stanbon(57422)

 Question 349196: 11,011₂+10,101₂ Click here to see answer by Jk22(389)

 Question 349188: Suppose that 65% of all adults in a certain community are obese and that 59% suffer from diabetes. If 77% of the adults in this community are obese or suffer from diabetes (or both), what is the probability that a randomly chosen adult in this community is both obese and suffering from diabetes? I think I have to add P(obese)+P(diabetes)-P(obese intersection with diabetes) =.65+.59-.77 but i am not sure.. Click here to see answer by jim_thompson5910(28598)

 Question 349224: Derek Jeter had 1 hit after three times at bat. Write hits as a percent? do I make it a fraction and go 1/3 and then divide 3 into 1? But 3% does not seem correct? Click here to see answer by jim_thompson5910(28598)

 Question 349278: The letters ALABAMA are contained in a bag. You reach in a pick "A". What is the probability of doing the same again? Click here to see answer by stanbon(57422)

 Question 349273: Approximately 11% of people are left-handed. If two people are selected at random, what is the probability that at least one is right-handed? Click here to see answer by stanbon(57422)

 Question 349272: Approximately 11% of people are left-handed. If two people are selected at random, what is the probability that one is right-handed and the other is left-handed? Click here to see answer by stanbon(57422)

 Question 349271: Approximately 11% of people are left-handed. If two people are selected at random, what is the probability that both are left-handed? Click here to see answer by stanbon(57422)

 Question 349270: Approximately 11% of people are left-handed. If two people are selected at random, what is the probability that both are right-handed? Click here to see answer by stanbon(57422)

 Question 349265: An urn contains chips 1,2,3,4,5,6. Two are drawn without replacement. Let the random variable W denote the larger of the two numbers drawn. I just need help setting up the chart here is what i have: x: 1| 2| 3| 4| 5| 6| fx(X): | | | | | | Click here to see answer by stanbon(57422)

 Question 349284: Approximately 11% of the people are left-handed. If two people are selected at random, what is the probability that one is right-handed and the other is left-handed? Click here to see answer by stanbon(57422)

 Question 349379: Please help me with this probability question.It is due tomorrow. 5. Consider the ‘symmetric’ distribution as shown in the table below, where a and b are any numbers between 0 and 1. x=1 Pr(X)=b,x=2 Pr(X)=a,x=3 Pr(X)=a,x=4 Pr(X)=b Prove that E(X)=2.5 Click here to see answer by Edwin McCravy(8921)

 Question 349530: Hello! Suppose A is a subset of B and that P(A)>0 and P(B)>0. Are A and B independent? Prove your answer? Thank you Click here to see answer by jim_thompson5910(28598)

 Question 349555: 70% of people liked a hamburger. on a certain day 8 people bought it for the first time. What is the expected number of people who will like the hamburger ? Click here to see answer by Theo(3472)

 Question 349551: 70% of the people who tried a hamburger liked it. 8 customers bought it for the first time. find the probability that at exactly 5 people like the hamburger Click here to see answer by Jk22(389)

 Question 349554: 70% of people like an apple. Find the standard deviation of people who like the apple. Click here to see answer by stanbon(57422)

 Question 349553: 70% of people liked a hamburger. on a certain day 8 customers bought it for the first time. Find the probability that at most 4 people liked the hamburger. Click here to see answer by stanbon(57422)

 Question 349552: 70% of people liked a hamburger. 8 customers bought it for the first time. Find the probability that at least 5 people like the hamburger. Click here to see answer by stanbon(57422)

 Question 349313: suppose the probability that you will be picked for a committee at school is 20 percent. what is the probability that you will not be picked? work out the problem plzzzzzzz thx Click here to see answer by stanbon(57422)

 Question 349200: How many people have to be in a room to make the probability greater than 50% that at least two will have the same birthday? Please show me the work....thank you! Click here to see answer by stanbon(57422)

 Question 349586: suppose the probability of spinning a 5 on a spinner is 3/4. What is the probabilty of not spinning a 5 on that same spinner? Click here to see answer by Fombitz(13828)

 Question 349588: drew tosses a quarter and rolled a 1-6 number cube. draw a tree diagram to show all the possible outcomes. Use H for heada and T for tails. use multiplication to show how many possible outcomes there are. show work and explain your answer. what is the probabilty of flipping a heads? show all work and explain your answer Click here to see answer by Fombitz(13828)

 Question 349587: I have a homework question that has me stumped. Desperatedly need help. A random variable X has moment generating function M(t) = (1-t)^-1. Find the rth moment of X. Click here to see answer by Fombitz(13828)

 Question 349491: (a) Find the CDF of X where X is a continuous random variable with pdf f(x) = 1/3 for the interval 0 to 1 and 2/3 for the interval 1 to 2. (b) Find the median of random variable X. Click here to see answer by Fombitz(13828)

 Question 349662: 1300 x (1+.0925) to the 35th power Click here to see answer by josmiceli(9697)

 Question 349671: Mrsl Larsen's third grade class has 22 students, 12 girls and 10 boys. Two students must be selected at random to be in the spring play. What is the probability that one boy and one girl will be chosen? Order is not important. Click here to see answer by stanbon(57422)
 Question 349671: Mrsl Larsen's third grade class has 22 students, 12 girls and 10 boys. Two students must be selected at random to be in the spring play. What is the probability that one boy and one girl will be chosen? Order is not important. Click here to see answer by Fombitz(13828)
 Question 349671: Mrsl Larsen's third grade class has 22 students, 12 girls and 10 boys. Two students must be selected at random to be in the spring play. What is the probability that one boy and one girl will be chosen? Order is not important. Click here to see answer by ewatrrr(10682)

 Question 349667: A batch of 100 calculators contains 5 defective calculators. If 6 calculators are selected at random from this batch, determine the probability that exactly two of those selected are defective. Click here to see answer by stanbon(57422)

 Question 349624: In hypothesis testing, why are verbal problem statements converted to numerical problem statements? Why is it important to identify the parameter when converting a problem statement from verbal to numerical? Click here to see answer by stanbon(57422)

 Question 349764: Approximately 15% of the calls to an airline reservation phone line result in a reservation being made. Suppose that an operator handles 15 calls. What is the probability that none of the 15 calls result in a reservation? (Give the answer to 3 decimals places.) Click here to see answer by Theo(3472)

 Question 349773: There are three barrels and each barrel contains an equal number of red, blue, green and yellow balls, The balls are buried in sawdust so that people cannot see them. You win by choosing 3 of the same color balls. You choose a ball from each barrel. \$1.00 per game. 3 balls of the same color wins \$20. 1. How many different ways are there of choosing the three balls from the barrels? Order matters. 2. How many of them are wins? 3. What is the probability of winning on one turn? 4 Do you think the game will make money? And how much will she expect to win or lose. Click here to see answer by Theo(3472)

 Question 349808: Hello Disease 1 and Disease 2 are prevalent among people in a certain population. It is assumed that 10% of the population will contract disease 1 sometime during their lifetime, 15% will contact disease 2 eventually,and 3% will contract both diseases. a)Find the probability that a randomly chosen person from this population will contract at least one disease. b)find the conditional probability that a randomly chosen person from this population will contact both diseases, given that he or she has contracted at least disease. Thank You Click here to see answer by jim_thompson5910(28598)

 Question 349831: A sharpshooter hits a target with probability 0.75. Assuming independence, find the probabilities of getting a hit followed by two misses. Click here to see answer by edjones(7569)

 Question 349766: Approximately 15% of the calls to an airline reservation phone line result in a reservation being made. What is the probability that at least one call results in a reservation being made? (Give the answer to 3 decimals places.) Click here to see answer by solver91311(16897)

 Question 349896: a quality control manager says that in the manufacturing of DVD players the rate of defects is 3%. two DVD players are selected at random and checked for defects. (round your answer to the nearest tenth of a percent.) a. find the probability that both DVD have defects. b. find the probability that both DVD players do not have defects. c. find the probability that at least one of the DVD players has defects d. the quality control manager selects at random 10 DVD players. what is the probability that all 10 DVD players do not have defects? Click here to see answer by Fombitz(13828)

 Question 349875: You pick 2 marbles at random without replacing the 1st one. The probability of drawing a blue and then a red is 4/15. The probability that the 1st marble is blue is 2/3. Find the probability that he first marble is blue Click here to see answer by Fombitz(13828)

 Question 349827: 5 balls, numbered 1,2,3,4,5 are placed in an urn. 2 balls are randomly selected from the 5, and their numbers noted. Find the proabability distribution for the following: a. The largest of the 2 sampled numbers b. The sum of the 2 sampled numbers Thank you Click here to see answer by edjones(7569)

 Question 349911: A coin is tossed five times. Find the probability that the sixth toss is a tail, given that the first five tosses were all tails. If a die is rolled one time, find the probability of getting a number greater than five. If one card is drawn from an ordinary deck of cards, what is the probability that the card will be an ace, a king of hearts, or a spade. A pet supplier has a stock of parkeets of which thirty percent are blue parakeets. A pet store orders three parakeets from this supplier. If supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet? A university has 10,000 students of which 4000 are male and 6000 are female. If a class of 30 students is chosen at random from university population, find the mean and variance of the number of male students. Click here to see answer by solver91311(16897)
 Question 349911: A coin is tossed five times. Find the probability that the sixth toss is a tail, given that the first five tosses were all tails. If a die is rolled one time, find the probability of getting a number greater than five. If one card is drawn from an ordinary deck of cards, what is the probability that the card will be an ace, a king of hearts, or a spade. A pet supplier has a stock of parkeets of which thirty percent are blue parakeets. A pet store orders three parakeets from this supplier. If supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet? A university has 10,000 students of which 4000 are male and 6000 are female. If a class of 30 students is chosen at random from university population, find the mean and variance of the number of male students. Click here to see answer by Fombitz(13828)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285