From a survey of 100 city residents, it was found that 40

From a survey of 100 city residents, it was found that 40 read the daily newspaper, 70 watch the evening news, and 30 do both. What is the (empirical) probability that a resident selected at random

(A) Reads the daily paper or watches the evening news?

(B) Does neither?

(C) Does one but not the other?