A baseball player has a batting average of 0.215. What is the probability that he has exactly 4 hits in his next 7 at bats? The probability is

Question

A baseball player has a batting average of 0.215. What is the probability that he has exactly 4 hits in his next 7 at bats?

The probability is

Answer 1

His probability of hitting, p= .215

his probablity of not hitting, q= 1- .215

You need to use 7 combination number 4, or 7! / ((4!) * (7-4)!). Then multiply this number (35) by p raised to the number of hits you are looking for, multiplied again by q raised to the total number (7) minus the number you are looking for.

7 C 4 * .215^4 * (1-.215)^3

The final answer should be .032