3 A person is selected at random from the population of Veri

3. A person is selected at random from the population of Verizon wireless subscribers. Let A be the event that the chosen subscriber has friends or family added to his/her plan, and B denote the event that the subscriber has unlimited text messaging. Extensive records show that: P(A)=0.37, P(B)=0.23 and P(A U B)=0.47 Find P(A B).

Solution

NOte that

P(A n B) = P(A) + P(B) - P(A U B)

= 0.37 + 0.23 - 0.47

= 0.13 [ANSWER]