SOLUTION: While shooting arrows, William Tell can hit an apple 9 out of 10 times. What is the probability that he will hit exactly 4 out of 7 times?
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-> SOLUTION: While shooting arrows, William Tell can hit an apple 9 out of 10 times. What is the probability that he will hit exactly 4 out of 7 times?
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Question 454590: While shooting arrows, William Tell can hit an apple 9 out of 10 times. What is the probability that he will hit exactly 4 out of 7 times? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! p=.9, q=.1
(p+q)^7 expansion of a binomial.
nCr=7C4=35 coefficient
35p^4q^3
=.02296 the probability that he will hit exactly 4 out of 7 times.
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Ed
