Question

Emily hits 60% of her free throws in basketball games. She had 25 free throws in last week's game. What is the variance of Emily's hits?

Answer 1

SOLUTION

The variance is calculated using:

$\text{variance}=\text{npq}$

n is the number of throw

Hence, n=25

p is the probability of success

Hence, p=60%=0.6

And q =1-p

Hence q = 0.4

Therefore the variance is calculated as

$\text{variance}=25\times0.6\times0.4$

Calculate the value:

$\text{variance}=6$