Chapter 6.2, Problem 6.20E

A city law-enforcement official has stated that 20% of the items sold by pawn shops within the city have been stolen. Ralph has just purchased 4 items from one of the citys pawn shops. Assuming that the official is correct, and for $x=$ the number of Ralph’s purchases that have been stolen, determine the following:

a. $P(x=0)$   b. $P(2\le x)$    c. $P(1\le x\le 3)$

d. $P(x\le 2)$    e.