The probability that an archer hits a target on a given shot is. 7 if five shots are fired find the probability that the archer hits the target on three shots out of the five.

Question

Elisa Rasmussen

Mathematics

11 January, 21:16

The probability that an archer hits a target on a given shot is. 7 if five shots are fired find the probability that the archer hits the target on three shots out of the five.

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Cordell Golden · Answer 1

This is a problem in "binomial probability." Either the archer hits his target or he does not. This experiment is performed 5 times (so that n=5), and the probability that the archer will hit the target is 0.7 (so that p=0.7).

We need to find the binomial probability that x=3 when the possible outcomes are {0, 1, 2, 3, 4, 5}.

You could use a table of binomial probabilities to evaluate the following:

P (5, 0.7, 3).

Alternatively, you could use a TI-83 or TI-84 calculator and its built-in "binompdf (" function.

I evaluated binompdf (5,0.7,3) and obtained the result 0.309.