From past experience it is known that 25% of accounts in a large accounting population are in
error.
a) What is the probability that 5 accounts are audited before an account in error is found?
b) What is the probability that the will be three account in error in the first five accounts
audited?
1
Expert's answer
2020-04-06T17:33:49-0400
a) This is a geometric distribution with p=0.75.
"P(X=6)=(1-p)^{6-1}p^1=0.75^5*0.25^1=0.0593."
b) This is a binomial distribution with p=0.25, n=5.
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