A small grocery store is considering installing an express checkout line. Let X be the number of customers in checkout line when you arrive at the checkout area. The probability distribution of X is given in the table below. Note that these numbers (0,1,2,3) include the customers being served, if any. X 0 1 2 3 P(X=x) 0.28 0.21 0.27 0.24 On average, how many customers would you expect to see in checkout line? Give your answers up to two decimal places.

A small grocery store is considering installing an express checkout line. Let X be the number of customers in checkout line when you arrive at the checkout area. The probability distribution of X is given in the table below. Note that these numbers (0,1,2,3) include the customers being served, if any. On average, how many customers would you expect to see in checkout line? Give your answers up to two decimal places