SOLUTION: Sean tells perspective clients that the probability of rain at the dive location is .2 each day. Which expression can be used to calculate the probability that it will rain on exac
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Question 143671: Sean tells perspective clients that the probability of rain at the dive location is .2 each day. Which expression can be used to calculate the probability that it will rain on exactly 5 days of the 7 days at the dive location?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
7C5*.8^2*.2^5
=21*.64*.00032
=.004301...
or you could take the 3rd term of a binomial expansion of (a+b)^7 where a=.2 and b=.8
21a^5b^2
=21*.00032*.64
.
Ed
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