SOLUTION: A person conducts a contest in which the listeners phone jn the answer to the contest question. If the person estimates that the probability of a caller giving the correct answer i
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Question 1177407: A person conducts a contest in which the listeners phone jn the answer to the contest question. If the person estimates that the probability of a caller giving the correct answer is 0.28,
a) What is the probability that the third caller is the winner?
b) What is the expected number of calls before a correct answer is received?
You can put this solution on YOUR website! a. This would be 0.72*0.72*0.28 or p(1-p)^2
=0.1452
=
b. E(X)=1/p=3.57
It is a geometric distribution but the pdf is x(1-x)^(n-1), where n=3, so that is where the square term comes from.
