A survey of top executives revealed that 35% of them regularly read Time magazine, 20% read Newsweek and 40% read Macleans & World Report. Ten percent read both Time and Macleans. What is the probability that a particular top executive reads either Time or Macleans regularly?
A) 0.85
B) 0.06
C) 1.00
D) 0.65

Question

Quizplus · Accepted Answer

We can use the formula:
P(Time or Macleans) = P(Time) + P(Macleans) - P(Time and Macleans)
P(Time or Macleans) = 0.35 + 0.40 - 0.10
P(Time or Macleans) = 0.65
Therefore, the probability that a particular top executive reads either Time or Macleans regularly is 0.65.

A Survey of Top Executives Revealed That 35% of Them