Problem 3

SmithDrug is a chain of drugstores with 20 similar-size stores in a given city. The sales in a given week for any of these stores in normally distributed with mean $ 19,000 and standard deviation $6,000.

(a) What will the expected value of the total sales of the 20 stores be?

$ [ ],000

Problem 3 continued

(b)What will the standard deviation of the total sales of the 20 stores be? Show your work