An Advertising Firm Found That a Certain Ad That Ran

Multiple Choice

An advertising firm found that a certain ad that ran on both radio and TV was only heard on the radio by 17 percent of the people and was only seen on TV by 34 percent of the people. Just 15 percent of the population both heard the ad on the radio and saw it on TV. What percent of the people in the area has neither seen nor heard the ad?

A) 34 percent
B) 85 percent
C) 66 percent
D) 36 percent
E) 64 percent