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

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

 Question 391397: How many oders can eight actors be listed in the opening credit of a movie if the leading actor must be listed first or last? Click here to see answer by solver91311(16885)

 Question 391402: I am taking my compass test tommorw and I need to know the formula to pprobability questions Click here to see answer by solver91311(16885)

 Question 391405: Thomas has a set of 26 alphabet cards, each having a different letter of the alphabet on it. He randomly draws one card and then rolls a fair die, numbered from 1 to 6. What is the probability he draws a card with a vowel (a, e, i, o, u) on it and then rolls an odd number? Click here to see answer by sudhanshu_kmr(1152)

 Question 391365: A cute otisis media, an infection of the middele ear, is a common childhood illness. There are various ways to treat the problem. T0 help determine the best way, the reserchers conducted an experiment. 100 children between 10 months an 2 years with recurrent acute otisis media were divided into 2 equal groups. Group 1 was treated by surgiccally removing the adenoids, the second using the drug Sulfafurazole. Follow-up lasted for two years, each child was tracked for 2 years, during which time of symtomps and episoodes of acute otisis media were recorded. The data were recorded in case fall2010a.xls in the following way: Column 1: ID number Column 2: Groupe number Column 3: Numbe of episodes of the illness Column 4: Number of visits to a fysician Column 5: Number of perscreptions Column 6: Number of days with symptoms of respiratory infection 1. Write an introduction about the case 2. Are there differences between the two groups with respect to the number of episodes, number of pysician visits, number of perscreptions , and number of days with symtoms of respiratory infection? 3. What treatment you would recommand for this illness. 4. Assume you are working for the company that makes the druf Sulfafurazole. Write a report to the company’s executives discussing your results. Click here to see answer by solver91311(16885)

 Question 391498: Find the first three iterates of the function f(x)=x^2-2, if the initial value is -2 Thank you so much for all of your help!!!!!!! God Bless!!!!!!! Click here to see answer by stanbon(57346)

 Question 391579: I'm sorry if this is the wrong place to put this so if it's wrong just please redirect. Please help with this The shoe sizes of women in a survey are distributed normally about the mean. Suppose the survey included data on 200 women. About how many women would you expect to wear sizes 5-7? Click here to see answer by stanbon(57346)

 Question 391642: 100% of the normal distribution is within how many standard deviations of the mean? Click here to see answer by edjones(7569)

 Question 391621: We have 2 girls and 4 boys to be seated ina 6-seat row at the movie theater. What is the probability that the two people at each end of the row were both boys or both girls? Answer should be in common fraction. My approach to this problem: Total possibilities of boys and girls is 4! * 2! No of success outcomes: for Girls: 2! * 2! for Boys : 4 p(both boys or both girls)= (4 + 2!*2!)/4! * 2! Is my approach correct? Click here to see answer by edjones(7569)

 Question 391668: Two cards are drawn with replacement from an ordinary deck of 52 playing cards. What is the probability that both cards are aces? Click here to see answer by edjones(7569)

 Question 391657: Suppose the variable X has a normal distribution with mean 36 inches and standard deviation 2 inches.What proportion of these values is between 32 and 40 inches? If one of these X values is chosen at random, what is the probability that it is between 34 and 38 inches? Click here to see answer by robertb(4012)

 Question 391681: Please help me solve this problem. An investor bought 150 shares of Fly-Hi Airlines stock. He paid \$60 per share for 50 shares, \$50 per share for 60 shares, and \$75 per share for 40 shares. What was his average cost per share? Click here to see answer by mananth(12270)

 Question 391679: Jen't purse contains three \$1 bills,four \$5 bills,and two \$10 bills .If she select three bills in succession, find the probability of selecting a \$10 bills,then a \$5 bills ,and then a \$1 bill if the bill are not replaced Click here to see answer by robertb(4012)

 Question 391643: Suppose the variable X has a normal distribution with mean 36 inches and standard deviation 2 inches. What proportion of these values is between 32 and 40 inches? Click here to see answer by ewatrrr(10682)

 Question 391729: Suppose the variable X has a normal distribution with mean 36 inches and standard deviation 2 inches.If one of these X values is chosen at random, what is the probability that it is less than 38 inches? Click here to see answer by ewatrrr(10682)

 Question 391758: Suppose the variable X has a normal distribution with mean 36 inches and standard deviation 2 inches.What X value approximates the 84th percentile of this distribution, that is what X value will have approximately 84% of the distribution to its left? Click here to see answer by ewatrrr(10682)

 Question 391757: Suppose the variable X has a normal distribution with mean 36 inches and standard deviation 2 inches. what X value represents the 50th percentile of this distribution, that is what X value will have 50% of the distribution to its left? Click here to see answer by ewatrrr(10682)

 Question 391767: A certain game has two stacks of 30 tiles with pictures on them.In the first stack of tiles, there are 10 dog,4 cat, 5 ball, and 11 horses.In the second stack of tiles, tere are 3 flower, 8 fish,12 balls, 2 cat and 4 horses. The top of tile in each stack is chosen.Find each probability. P(both are fish) Please! help me with this home work Thank you! Click here to see answer by stanbon(57346)

 Question 391680: if the mean of 19 number is 1600. If 2000 number is added Find out the new mean? Click here to see answer by richard1234(5390)

 Question 391916: a survey of of 150 people indicated that 80people would buy new shoes in the folllowing year, 95 people would buy a snappy hat, and that 32people would buy neither. a) how many people would buy both new shoes and a snappy hat this year? b) how many people would buy new shoes or a snappy hat this year? Click here to see answer by robertb(4012)

 Question 391926: a fair coin is flipped 4 times. what is the probability that a) the last toss results in a tail b) if the first and second tosses are heads that the third is also a head c) if the first and second tosses are heads that the four tosses will result in two heads and two tails d) the four tosses will result in four heads Click here to see answer by jerryguo41(162)

 Question 391927: an unfair coin will turn up heads 4 out of 5 times (i.e. P(heads)=0.8). what is the probability that a) on three tosses we get a heads, then a tails, then a heads. b) on two tosses we get a heads and a tails (in any order) Click here to see answer by sudhanshu_kmr(1152)

 Question 391928: if x and y vary inversely, complete the table below. x | 1 | 2 | _ | -12 y |12 | _ | 3 | _ if anyone can help me with this i would greatly appreciate it. Click here to see answer by ewatrrr(10682)

 Question 391743: How many ways can 5 students be chosen from a group of 4 juniors and 6 seniors to be on the prom committee if exactly 3 strudents must be seniors? Thank you so much!!!!!! God Bless!!!!!! Click here to see answer by sudhanshu_kmr(1152)

 Question 391656: If one of the X values is chosen at random, what is the probability that it is between 34 and 38 inches? Click here to see answer by richard1234(5390)

 Question 391998: Marco draws a card and replaces it 10 times from a standard deck of 52 cards. He draws 8 red cards and 2 black cards. What is the theoretical probability that he will draw a red card on his 11th draw? Click here to see answer by ewatrrr(10682)

 Question 391988: 56. Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is .90. We select four flights from yesterday for study. a. What is the likelihood all four of the selected flights arrived within 15 minutes of the scheduled time? b. What is the likelihood that none of the selected flights arrived within 15 minutes of the scheduled time? c. What is the likelihood at least one of the selected flights did not arrive within 15 minutes of the scheduled time? Click here to see answer by edjones(7569)

 Question 391970: froma sample of 20, What is the probability that your friend would pick an odd number or a number greater than 13? (eliminate double counting) Click here to see answer by edjones(7569)

 Question 392036: Please! help my son this home work,I don't understand word either two cards are drawn from a standard deck of cards .Find probability P(both either black or an ace) P(both jack or both face cards) 1. 28/52=14/26=7/13 2.4/52*12/52=48/2704=24/1352=12/676=6/338=3/169 7/13*3/169=21/2197 Click here to see answer by Alan3354(30993)
 Question 392036: Please! help my son this home work,I don't understand word either two cards are drawn from a standard deck of cards .Find probability P(both either black or an ace) P(both jack or both face cards) 1. 28/52=14/26=7/13 2.4/52*12/52=48/2704=24/1352=12/676=6/338=3/169 7/13*3/169=21/2197 Click here to see answer by stanbon(57346)
 Question 392036: Please! help my son this home work,I don't understand word either two cards are drawn from a standard deck of cards .Find probability P(both either black or an ace) P(both jack or both face cards) 1. 28/52=14/26=7/13 2.4/52*12/52=48/2704=24/1352=12/676=6/338=3/169 7/13*3/169=21/2197 Click here to see answer by MathGenius101(2)

 Question 392028: Suppose that A and B are independent events such that P(A with a bar on top)= 0.40 and P(B) = 0.20. Find P(A upside down u B) and P(AuB). Click here to see answer by stanbon(57346)

 Question 392066: two cards are drawn from a 52card deck without replacement. what is the probability that the 2nd card is a heart? Click here to see answer by Edwin McCravy(8909)

 Question 392085: Suppose the Q-angles (measured standing) for a population of young adult women are normally distributed with a mean of 19 degrees and standard deviation of 8degrees. Let us call this variable X. What is the z-score for an X-value of 24 degrees? Click here to see answer by stanbon(57346)

 Question 392053: If there are 9 songs, five slow and four fast but each song must be played once with a slow song beginning and a slow song ending, how many combinations can you come up with? Click here to see answer by sudhanshu_kmr(1152)

 Question 392109: for the coming weekend, the probability that it snows on sat and sun is 60% and 75% respectively. what is the probability it snows on at most one day this weekend? Click here to see answer by robertb(4012)

 Question 392107: determine the probability that a 5-card hand has at least 3 face cards? Click here to see answer by sudhanshu_kmr(1152)

 Question 392133: Two cards drawn from standar deck of cards.Find probability P(2 aces) Thank you so much Click here to see answer by robertb(4012)

 Question 392129: A die rolled 3 time. Find probability P(three even numbers) P(no 4s) thank you so much Click here to see answer by robertb(4012)

 Question 392118: Suppose the Q-angles (measured standing) for a population of young adult women are normally distributed with a mean of 19 degrees and standard deviation of 8 degrees. Let us call this variable X. What is the probability that a randomly chosen X-value is less than 24 degrees? What is the probability that a randomly chosen X-value is greater than 24 degrees? Click here to see answer by ewatrrr(10682)

 Question 392132: Two cards drawn from standar deck of cards.Find probability P(1 heart, 1club) P(1 queen, 1 king) Thank you so much Click here to see answer by ewatrrr(10682)

 Question 392128: Please! HELP me with my sonhome work A die rolled 3 time. Find probability P(1 then 2 then 3) P(three 1s)thank you so much Click here to see answer by ewatrrr(10682)

 Question 392131: Dan have 12 books on his shelf that he has not read yet.There are seven novel and five biographies.He wants to take 4 books with him on vacation.What is the probability that he randomly select two novels and 2 biographies? thank you so much Click here to see answer by ewatrrr(10682)

 Question 392207: chances of winning a race: p(100)= 2/5, p(200)=(1/3), p(400)= (1/10) i need to find the probability of winning all three Click here to see answer by stanbon(57346)

 Question 392206: I have a class to take in a couple of weeks and I am not sure about my pre test questions. 1. if Q = AV solve for V ? 2. If SP H = (1 + f h ) VPduct, solve for F h? 3. Mole fraction = X 1 = (X1=X2) ser up a numerical example. Click here to see answer by stanbon(57346)

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