A survey of top executives revealed that 35% of them regularly read TIME Magazin

Question

A survey of top executives revealed that 35% of them regularly read TIME Magazine, 20% read Newsweek and 40% read US news and world report. A total of 10% read both time and US news and world report. What is the probability that a particular top executive reads either time or US news and world report regularly? A survey of top executives revealed that 35% of them regularly read TIME Magazine, 20% read Newsweek and 40% read US news and world report. A total of 10% read both time and US news and world report. What is the probability that a particular top executive reads either time or US news and world report regularly?

Explanation / Answer

First of all, you can forget about 20% of Newsweek reader, it's there to confuse you.


35% read TM, 40% read US&WR, and 10% read both.

To put it simply, the 10% that read both, are already included in 35% TM and 40% US&WR.

So, to find the percentage of reader that read either TM or US&WR, you just have to add the two individual percentage, and subtract it with the percentage for both.
= 40% + 35 % - 10 %
= 65%

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