A manager notices that the number of items purchased by visi

A manager notices that the number of items purchased by visitors to a store is zero with probability 0.38, one with probability 0.44, two with probability 0.15, and three with probability 0.03. What is the expected number of items purchased by a visitor to the store?

Solution

expected number of items purchased by the vistors

= summation of xP(x), x is number of items

= 0*0.38 + 0.44 + 2*.15 +3*.03 = 0.83