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Overlapping Set M22

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Overlapping Set M22 [#permalink] New post 18 Mar 2012, 08:59
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Out of 320 people, 75% like talk-show 1 and 65% of the people who like talk-show 1 also like talk-show 2. If there are no people who like talk-show 2 but do not like talk-show 1, how many of the 320 people do not like talk-show 2 ?

72
84
120
156
164

P(who like talk-show1) = 320*75/100 = 240

P(who like Talkshow1 &talk show2) i.e P(both) = 65/100*240 = 156

P(who donot like talk show2) = P(who like ONLY talkshow1) = 240-156 =84

But the answer is E

Can anybody pls clarify?

Anu
[Reveal] Spoiler: OA
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Re: Overlapping Set M22 [#permalink] New post 18 Mar 2012, 18:31
there are no ppl who like talk show 2 but not talk show 1 => people who like talk show 2 = 156
ppl who do not like talk show 2 = total 320 - people who DO like talk show 2 (which is 156) = 164
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Re: Overlapping Set M22 [#permalink] New post 19 Mar 2012, 19:02
Draw table........visual method is best method for this problem.
Re: Overlapping Set M22   [#permalink] 19 Mar 2012, 19:02
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