4./ According to statistics the probability that a student finish college within

Question

4./ According to statistics the probability that a student finish college within 4 years is.8. We have a group of 15 students. a./ Find the formula for the exact probability that exactly probability that exactly 12 of the 15 students will finish college within 4 years. (What is the name of this distribution?)Don't try to calculate this exact probability. b./ Calculate the probability in question a./ using the table provided at the end of your test. c./ Let X be the number of students who will finish college within 4 years among the 15. Find the expected value and the standard deviation of X.

Explanation / Answer

the probability for one student is .8, thus probability for two students will be .8*.8 = .64

similarly for 12 students it will be .8^12 = 6.9 * 10^(-2)

it seems to be poissons distribution to me

you should hv provided full question

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