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

Tutors Answer Your Questions about Probability-and-statistics (FREE)

Question 497385: 7 Pink, 5 Black, 11 Yellow balls are there. Minimum no. atleast to get one black and yellow
Ball?

Click here to see answer by richard1234(5390)

Question 497490: For a biology project, you measure the weight in grams and the tail length in millimeters (mm) of a group of mice. The equation of the least-squares line for predicting tail length l from weight w is
l = 22+w
By looking at this equation you can see that the correlation between weight and tail length is

less than zero

greater than zero

Can't tell without seeing the data.

Click here to see answer by richard1234(5390)

Question 497668: What is the probability of having 60 minutes in the next hour? As a fraction, decimal and precent
Click here to see answer by MrMitchell(3)

Question 497681: 16 marbles total/
2green and 3 whites. if one is drawn it is not repalce. what is the probability of this.

thanks
Click here to see answer by solver91311(17077)

Question 497768: In the game of Monopoly, the probability of going to jail in any one turn is
about 4.5%. What is the probability of NOT going to jail?
Click here to see answer by Gogonati(817)

Question 497780: In the game of Monopoly, the probability of going to jail in any one turn is about 4.5%. What is the probability of NOT going to jail?
Click here to see answer by Alan3354(31532)

Question 497752: In the game of Monopoly, the probability of going to jail in any one turn is about 4.5%. What is the probability of NOT going to jail?
Click here to see answer by Alan3354(31532)

Question 398506: This probability distribution shown below relates to the number of times a person goes to a local coffee shop per day. What is the expected mean (average) number of times a person goes to a local coffee shop per day?
x P(x)
0 0.65
1 0.15
2 0.2

Click here to see answer by cnc.ryan(1)

Question 497848: Can you please help me with this problem:

A photo-processing kiosk charges $0.25 for each print it produces. The cost of producing the print is $0.08 per print. The overhead cost $45.00 per day to rent and staff the kiosk. How many prints must be produced each day to realize a profit of at least $50.00 per day?
Click here to see answer by josmiceli(9817)

Question 498471: Factories A and B produce computers. Factory A produces 2 times as many computers as factory B. The probability that an item produced by factory A is defective is 0.021 and the probability that an item produced by factory B is defective is 0.024.
A computer is selected at random and it is found to be defective. What is the probability it came from factory A?
Click here to see answer by Theo(3504)

Question 498517: there's 10 girls and 6 boys in a class. the teacher draws one students name and then anothe. what is the probability that the first name will be a boy and the second will be a girl?
Click here to see answer by stanbon(57977)

Question 498090: A bowl contains 16 chips, of which, 6 are Red, 7 are white, and 3 are Blue. If four chips are taken at random and without replacement, find the probability that there is at least one chip of each color.
I think the answer is 1 minus sum of the probabilities of: (no red), (no white) (all red) and (all white). Is that the right way to think about it. The answer I ended up with was (447/640) or about 69.8%.
Click here to see answer by scott8148(6628)

Question 498736: Suppose the "equality" statement is really true. Management doesn't know this, of course - that's why they're conducting a hypothesis test in the first place. But, we're on the outside, looking in, and we "see" that the "equality" statement is true in the real world. What does management have to do to "provide strong support" for the "equality" statement, sufficiently strong that the "equality" statement will be believed
Click here to see answer by richard1234(5390)

Question 498764: 1000 people went to the fair. If the fair charged $2 per child and $3 per adult and made a total of $2600, how many children and how many adult went?
Click here to see answer by solver91311(17077)

Question 498869: you got 52 playing cards if you choose to cards at random without replacing them what the probability of choosing a king then a jack?
Click here to see answer by nerdybill(7008)

Question 498954: A card is chosen at random from a deck of 52 cards. It is replaced and a second card is chosen. What is the probability both cards will be an Ace?

Click here to see answer by chessace(471)

Question 499008: A boy found a bicycle lock for which the combination was unknown. The correct combination is a four-digit number. The digits are selected from 1, 2, 3, 5, 6, and 7.
a.What is the probability that he can open the lock by putting four random numbers in for the combination?
b.What is the probability that he can open the lock at random if he knows that the combination is an odd number?
c.What is the probability that he can open the lock at random if he knows that the numbers in the combination cannot be repeated?
Click here to see answer by josmiceli(9817)

Question 499059: If you have two alarm clocks what is the probability that they both fail?

Click here to see answer by jim_thompson5910(28717)

Question 499059: If you have two alarm clocks what is the probability that they both fail?

Click here to see answer by chessace(471)

Question 499197: • Does all statistical data have a mean, median, or mode?
Click here to see answer by oberobic(2304)

Question 499183: The mode of the data 2, 18, 12, 10, 99, 10, 11, 7, 9, 5, 2 is :
(1) 2 (2) 10
(3) 5 (4) 9
Click here to see answer by nerdybill(7008)

Question 499222: Two hundred customers came into the store today and only one hundred of them made a purchase. what percentage of customers made purchase today?
Click here to see answer by Maths68(1474)

Question 499278: The number ways to select 4 dishes out of 6 different dishes is :
(1) 30 (2) 24
(3) 4 (4) 15
Click here to see answer by Maths68(1474)

Question 499291: Determine which events are mutually exclusive and which are not when a single die is rolled.
i) Getting an odd number and getting an even number
ii) Getting a 3 and getting an odd number
iii) Getting an odd number and getting a number less than 4
i) Getting a number greater than 4 and getting a number less than 4
Click here to see answer by Theo(3504)

Question 499325: A fair die is rolled 10 times. What is the probability that an odd number (1, 3 or 5) will occur between 2 and 4 times (inclusive)?
Click here to see answer by Edwin McCravy(8999)

Question 499462: How many words with or without dictionary meaning can be made from the
letters in the word MONDAY, assuming that no letter is repeated, if 4 letters
are used in time?
Click here to see answer by chessace(471)

Question 499505: Mean = 100; Standard deviation = 8
Determine the area or probability of p(x < 98)
Please explain how to obtain the answer as I have 4 more to figure out. Thank you!
Click here to see answer by richard1234(5390)

Question 499501: A card is drawn from a pack of 52 cards and it is thrown away . Then another card is drawn . Find the probability that it is king.
Click here to see answer by edjones(7569)

Question 231925: 1-A headlight company claims that the average headlight they produce lasts 300 days. A scientist randomly selects 15 headlights. The sample mean is 290 days, with a standard deviation of 50 days. If the company’s claim were true, what is the probability that 15 randomly selected headlights would have an average life of no more than 290 days?: *
2-A champion gambler attends a tournament in Las Vegas. His particular probability of winning a game of poker is 70%. What is the probability that the first poker game he wins in the tournament is his fifth game?:
3-The number of animals kept in a room at a randomly selected shelter is described by the following data. What is the probability that 3 or more animals are kept in a room?: *
NUMBERS OF ANIMAILS 1 2 3 OR MORE
PROBABILITY 0,55 0,38 ?
4-Which of the following is a reason to use a one-sample t-test instead of a one-sample z-test?: *
a. The variables are continuous.
b. The standard deviation of the population is unknown.
c. The sample size is large.
d. None of the above.
5-Two fair six-sided dice are thrown. If the sum of the dice is even, what is the probability that at least one 6 is showing?: *
A. 5/36
B. 1/12
C. 11/36
D. 1/6
6-Suppose A and B are independent random variables. The variance of A is 9, and the variance of B is 7. Let C=A-B. What is the standard deviation of C?: *
a. 1.4
b. 2.0
c. 3.7
d. 4.0

Click here to see answer by mgenesi19(1)

Question 499852: A club decides to sell tshirts for $12 each for a fundraiser. It costs $20 plus $8 each Tshirt to make the tshirts. Write and solve an equation to find out how many tshirts the club needs to make and sell to make a profit of at least $100.
Click here to see answer by nerdybill(7008)

Question 499896: Assume that you select 2 coins
at random from 7 coins: 3 dimes and 4 quarters.
What is the probability that both of the coins selected are dimes?
Click here to see answer by Edwin McCravy(8999)

Question 500069: how many ways can you get a Jack or seven from a deck of cards
Click here to see answer by oberobic(2304)

Question 500434: If the probability of an event is 0.7, what are the odds in favor of the event?

Click here to see answer by Edwin McCravy(8999)

Question 500704: how do you work 45r-7=56r-73

Click here to see answer by oberobic(2304)

Question 500816: Boating If the equilibrium point is y=0, then y=-5cos(πt/6) model a buoy bobbing up and down in the water.

Click here to see answer by Alan3354(31532)

Question 501063: If a student completes 7/8 of a math quiz that has forty questions, how many questions did the student answer?
Click here to see answer by nerdybill(7008)

Question 501059: Sue played the same computer game.
She won 12 of the games she played, and so she estimated the probability of winning each game to be 0.4
How many games did Sue play? Show your working.
Click here to see answer by nerdybill(7008)

Question 501519: the answer to 27/40
Click here to see answer by edjones(7569)

Question 502298: You are dealt two cards successively (without replacement) from a shuffled deck of 52 playing cards. Find the probability that both cards are black.
Click here to see answer by stanbon(57977)

Question 502104: A group of 24 AP students measured the length of time it took for a chocolate chip to melt in their mouth in seconds. They melted a total of 80 chips. The ive number summary in seconds for this set turned out to be as follows:
12, 29, 35, 38, 41
Approximately how many chips had melted time between 12 - 29 seconds?
Click here to see answer by stanbon(57977)

Question 502556: determine whether the given value is a statistics or parametre
A sample of Americans is selected and the average (mean) amount of time watching television is 4.6 hours per day
Click here to see answer by stanbon(57977)

Question 502679: the key to a cd software is a 25 character alphanumeric code. each character can be a capital letter or single digit number.

what is the probability of guessing the correct code on the first try?
Click here to see answer by stanbon(57977)

Question 502900: Hello:
This one has me stumped. The probability that Student A comes to class is .99. INDEPENDENTLY, the probability that Student B comes to class is .98. The probability that NEITHER attend class is (this is what the answer is I must come up with)? Is this where an intersection would come in? P(A intersect B) Thank you for any assistance you can provide. :)

QR
Click here to see answer by sudhanshu_kmr(1152)

Question 503049: Train A leaves a station traveling @ 20mph. 2 hrs later, Train B leaves the same station traveling @ 30mph in the same direction. how long does it take for train B to catch up with train A ?
Click here to see answer by mananth(12270)

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, 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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, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555