In a particular city 20 of the people subscribe to the morni

In a particular city, 20% of the people subscribe to the morning newspaper, 30% subscribe to the evening news paper, and 10% subscribe to both. Determine the probability that an individual from this city subscribes to the morning newspaper, the evening newspaper, or both.

Solution

let a be the event they subscribe to morning. b be the event they subscribe to evening. and let c be P(a)+P(b) P(A)=.20 p(B)=.3 p(C)=P(A)+P(B)-overlap .3+.2-.1=.4