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

The correct option is :  C.  3.4

Step-by-step explanation:

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

That means, here  

Given that, the sample size

So, the Mean

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