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

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

Question 354174: Find P(A or B) for the folowing: P(A)=0.64, P(B)=0.64, and P(A and B)=0.46. P(A or B) =
Click here to see answer by stanbon(57361)

Question 354126: In a survey of 3224 U.S adults, 1515 said flying is the most stressful form of travel.
Click here to see answer by stanbon(57361)

Question 354194: if a baby is randomly selected, find the probability that the baby is a female or has black hair?
how am i solve to this? she gives us a chart

Brown Blonde Black Auburn None Totals
Male 5 24 28 0 8 65
Female 9 18 16 3 5 51
Totals 14 42 44 3 13 116

Click here to see answer by ewatrrr(10682)

Question 354219: The probability that any given person is allergi to a certain drug is 0.08. What is the probability that none of three randomly selected persons is allergic to this drug? Assume that all three persons are independent. Do not round your answer.
Click here to see answer by ewatrrr(10682)

Question 354229: Suppose the probability of selling a car today is 0.32. Find the odds against selling a car today?
Click here to see answer by sudhanshu_kmr(1152)

Question 354229: Suppose the probability of selling a car today is 0.32. Find the odds against selling a car today?
Click here to see answer by ewatrrr(10682)

Question 354214: If a person rolls doubles when he tosses two dice, he wins $5.00. For the game to be fair, how much should the person pay to play the game?
Click here to see answer by checkley77(12569)

Question 354215: A random sample of 253 adults was take, and they were asked whether they prefer watching sports (WS) or opera on tv (OTV). The following table gives the two-way classification of these adults.
Male (WS)-93
Male (OTV)-27
Female (WS)-42
Female (OTV)-91
If one adult is selected at random from this group, find the probability that this adult (round answers to three decimal places)
A.Prefers watching opera
B.Is male
C.Prefers watching sports given that the adult is a female
D.Is a male given that he prefers watching sports
E.Is a female and prefers watching opera
F.Prefers watching sports or is a male
Click here to see answer by sudhanshu_kmr(1152)

Question 354259: A box contains 9 red marbles, 8 green marbles, 5 yellow marbles, and 2 blue marbles. If 3 marbles are drawn at random, without replacement, what is the probability that all 3 marbles are green?
Click here to see answer by ewatrrr(10682)

Question 354285: Suppose the probability of selling a car today is 0.34. Find the odds against selling a car today?
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Question 354296: Suppose the probability of selling a car today is 0.36. Find the odds against selling a car today?
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Question 354307: Suppose the probability of selling a car today is 0.28. Find the odds against selling a car today?
Click here to see answer by Edwin McCravy(8909)

Question 354256: In a shipment of 30 televisions, 4 are defective. If 2 sets are randomly selected and tested, what is the probability that both are defective? (The first one is not replaced before the second one is selected.)
Click here to see answer by scott8148(6628)

Question 354335: A supplier contract calls for a key dimension of a part to be between 1.95 and 2.05 cm. The supplier has determined that the standard deviation of its process which is normally distributed, is 0.10 cm.
a. If the mean is 1.98, what fraction of parts will meet specifications?
b. If the mean is adjusted to 2.00, what fraction of the parts will meet specifications?
c. How small must the standard deviation be to ensure that no more than 2% of parts are nonconforming, assuming the mean is 2.oo?
Click here to see answer by stanbon(57361)

Question 354342: A division has 20 employees, 12 males and 8 females. how many ways can they choose a president, a vice president, and a secretary in that order, if the president has to be a female and the other officers must be male?
Click here to see answer by stanbon(57361)

Question 354373: Find the minimum sample size you should use to assure that your estimate of p hat will be within the required margin of error around the population p. Assume the Margin of error is 0.08 with a confidence level of 95%. From a prior study, p hat is estimated to be 0.2.
Click here to see answer by stanbon(57361)

Question 354408: What are the chance of getting 5 red cards out of a 52 card deck? How do u work this problem
Click here to see answer by scott8148(6628)

Question 354410: In an ESP experiment, participants are required to predict the color (red or black) of a card drawn randomly from a complete deck. If a participant correctly identifies the color for 38 out of 64 trial, is that person performing significantly better than chance? Test at .05 significance level.
Click here to see answer by stanbon(57361)

Question 354455: In a room full of 30 people, what is the probability that at least two people have the same birthday (not including the year.)
Click here to see answer by Edwin McCravy(8909)

Question 354522: 3. You have a bag containing 4 pieces of red candy, 2 pieces of green candy, and 3 pieces of blue candy. If you reach into the bag 4 times and pull out a piece of candy, look at it , and replace it what is the probility that you'll get a green piece of candy each time?

Click here to see answer by vleith(2825)

Question 354601: Find the probability of the following card hands from a 52-card deck. In poker, aces are either high or low. A bridge hand is made up of 13 cards.
In bridge, all cards in one suit
Click here to see answer by vleith(2825)

Question 354607: Mike can make 60% of his attempts from the foul line. Jake can make 70% of his attempts from the foul line.
A. If each man shoots once what is the probability that they both make a basket?
B. If each man shoots once what is the probability that at least on of them will make a basket?
C. If he shoots 4 times, what is the probability that Jake makes all 4 shots
D. If he shoots 4 times what is the probabilty that mike misses all 4 shots?
Click here to see answer by stanbon(57361)

Question 354602: Find the probability of the following card hands from a 52-card deck. In poker, aces are either high or low. A bridge hand is made up of 13 cards.
In bridge, exactly 3 kings and exactly 3 queens?
Click here to see answer by stanbon(57361)

Question 354612: Find the probability of the following card hands from a 52-card deck. In poker, aces are either high or low. A bridge hand is made up of 13 cards.
In bridge, exactly 3 kings and exactly 3 queens
Thanks so much
Click here to see answer by Edwin McCravy(8909)

Question 354659: In a room full of 30 people, what is the probability that at least two people have the same birthday (not including the year, so alice and bob are both born on jan 7th)?
(hint: consider the complement)
Click here to see answer by vleith(2825)

Question 354696: A binomial probability distribution has n = 15 trials with the probability of success on each trial is p = .65. Calculate the following.
a. The mean, m, of the distribution
b. The standard deviation s, of the distribution
c. The probability of 10 successes
d. The probability of 10 failures
e. The probability of at least 14 successes

Click here to see answer by stanbon(57361)

Question 354694: A normal distribution has a mean of 36 and a standard deviation of 8. Calculate the probability that an element selected from the population is:
a. < 25
b. > 33
c. Between 22 and 35
d. > 36
e. Between 21 and 27

Click here to see answer by Edwin McCravy(8909)

Question 354691: seventy percent of all children in a school do not have cavities. From the binomial probability distribution table, the probability that in a random sample of eleven children selected from the school that at least 7 will not have cavities is:
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Question 354796: recall that a short deck has 16 cards that include aces, 2s, 3s, 4s. three cards are drawn, what is the probability the third is an ace?
Click here to see answer by Edwin McCravy(8909)

Question 354831: Spoke Weaving Corporation has eight weaving machines of the same kind and of the same age. The probability is 0.4 that any weaving machine will break down at any time.
Round the answers to 4 decimal places.
Find the probability that at any given time all eight machines will be broken down.
What if the probability is 0.1? And find the prob that two machines will break.
What if the probability is 0.4? And find the prob that none of the machines will be broken down.

Click here to see answer by lleonardi(1)

Question 354832: 256 is the answer but the base is 4

Click here to see answer by Fombitz(13828)

Question 354889: A pair of diece is rolled 50 times. Find the propability of odtaining double six at least 3 times.
A-Six appear, P(A)=2/12= 1/6=p ;; q=10/12=5/6
n-50trials , k-3 six

P50(3)=(50)(1/6)^3(5/6)^47 ~~0.01723
................3
Click here to see answer by stanbon(57361)

Question 354972: A vaccine is 90 percent effective.What is the probability that it is effective for one and only one individual out of 20 individuals?
Click here to see answer by robertb(4012)

Question 355009: The Tennessee Tourism Institute (TTI) plans to sample information center visitors entering the state to learn the fraction of visitors who plan to camp in the state. Current estimates are that 32 percent of visitors are campers.

How large a sample would you take to estimate at a 90 percent confidence level the population proportion with an allowable error of 2 percent?
Click here to see answer by stanbon(57361)

Question 355015: In a certain high-risk group, the chances of a person having suffered a heart attack are 55%. If 6 people are chosen, find the probability that at least 1 will have had a heart attack.
Click here to see answer by stanbon(57361)

Question 355032: The probabiity that George will study for the test is 4/10. The probability that he will pass given that he studies is 9/10. The probability that he passes given that he doesn't study is 3/10. What is the probability that he has studied given that he passes the test?
Click here to see answer by robertb(4012)

Question 355049: Flip a fair coin 6 times. Find the probability of getting the following outcome. (Round your answer to six decimal places.)
at least 4 heads
Click here to see answer by robertb(4012)

Question 355065: I am going to roll a die & decide what I should have for dinner based upon what the die shows. If I roll an even number I will cook chicken for dinner. If I roll an odd number bigger than 3 I will cook fish. If I roll an odd number smaller than 5 I will cook a vegetarian meal. My husband only likes 1/2 of hat I cook.
a) What is the probability I will cook chicken?
b) What is the probability I will cook fish?
c) What is the probability I will cook a vegetarian meal?
d) What is the probability my husband will like what I cook?
Click here to see answer by sudhanshu_kmr(1152)

Question 355048: Flip a fair coin 10 times. Find the probability of getting the following outcome. (Round your answer to three decimal places.)
at most 2 heads
Click here to see answer by sudhanshu_kmr(1152)

Question 355092: how does the sample's shape compare to the population's shape?
Click here to see answer by robertb(4012)

Question 355022: how many different ways can 8 speakers be seated on a stage?
Click here to see answer by robertb(4012)

Question 355107: this is the last problem I have on my homework assignment due today. Can you help?
Find the probability that a standard normal random variable will assume a value between: Find z0 so that P(z > z0) = 60%
Click here to see answer by Fombitz(13828)

Question 355027: Find the probability that at least 8 had CD players for a sample of 14 teenagers if 60% of them had compact disk players by the age of 16.
Click here to see answer by Fombitz(13828)

Question 355169: You are dealt 2 cards successively without replacement from a standard deck of 52 playing cards. Find the probability that the first card is a 2 and the second card is a 10. round the answer to three decimal places

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