Question

The probability is 0.2 that a person shopping at a certain store will spend less than $20. For groups of size 17, find the mean number who spend less than $20.

A. 16.0
B. 13.6
C. 3.4
D. 4.0

Answer 1

The correct option is : C. 3.4

Explanation:

The probability that a person shopping at a certain store will spend less than $20 is 0.2

That means, here
`p= 0.2`

Given that, the sample size
`(n)= 17`

So, the Mean
`=n*p= 17*0.2=3.4`

Thus, the mean number who spend less than $20 will be 3.4