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A container has 50 marbles. 22 are blue, 11 are red, 8 are yellow, and the rest are white. Suppose we sample 5 marbles in a row, with replacement.
a) What is the probability that exactly 4 of them are blue?
b) What is the probability that at least one is yellow?
c) What is the probability that fewer than 2 are white?
d) How many would you expect to be red?
Any help would be greatly appreciated!
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For a, I would use the binomial distribution on all of them.
a) Let "drawing a blue marble" be a success, and drawing a marble that's not blue be a failure.
b) Let success be not yellow, and then take the compliment of five successes.
c. Success: white marble. Take sum of probability of zero and one successes.
d) Success is a red marble. Find the mean. (The binomial distribution has a very neat and easy formula for obtaining the mean. It's in your textbook, or a search will reveal it on this site.)
You can shear a sheep many times but skin him only once.
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I got all of them except c). Thanks for your help!
:3
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I got all of them except c). Thanks for your help!
:3
You're welcome.
What answer did you give for C?
You can shear a sheep many times but skin him only once.
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