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Overlapping Set M22

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Intern
Intern
avatar
Joined: 28 Feb 2011
Posts: 35

Kudos [?]: 8 [0], given: 1

Overlapping Set M22 [#permalink]

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New post 18 Mar 2012, 07:59
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

Kudos [?]: 8 [0], given: 1

Intern
Intern
avatar
Joined: 04 Mar 2012
Posts: 1

Kudos [?]: [0], given: 0

Re: Overlapping Set M22 [#permalink]

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New post 18 Mar 2012, 17:31
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

Kudos [?]: [0], given: 0

Manager
Manager
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Joined: 28 Apr 2011
Posts: 177

Kudos [?]: 10 [0], given: 6

Re: Overlapping Set M22 [#permalink]

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New post 19 Mar 2012, 18:02
Draw table........visual method is best method for this problem.

Kudos [?]: 10 [0], given: 6

Intern
Intern
avatar
Joined: 03 Apr 2012
Posts: 27

Kudos [?]: 13 [0], given: 10

Re: Overlapping Set M22 [#permalink]

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New post 27 Jul 2013, 21:38
Can someone please explain this in detail?

I got 84 too.

Kudos [?]: 13 [0], given: 10

Re: Overlapping Set M22   [#permalink] 27 Jul 2013, 21:38
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Overlapping Set M22

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