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# In a survey of 150 persons, how many were smokers and

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Intern
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In a survey of 150 persons, how many were smokers and [#permalink]  28 Nov 2003, 22:55
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60% (01:48) correct 40% (01:12) wrong based on 15 sessions
In a survey of 150 persons, how many were smokers and drinkers?

(1) 80% of the person surveyed were drinkers
(2) 40% of the smokers were drinkers also
[Reveal] Spoiler: OA
Intern
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E

This questions cannot be answered because, it has not been said that the 150 people were either smokers or drinkers.

Bharathi.
Manager
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I would say E also.

Because we're not told how many smokers were drinkers, or how many of 150 were drinkers.
SVP
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Likewise, it is possible that there are people who neither smoke nor drink
Manager
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%'S [#permalink]  10 Dec 2011, 16:55
In a survey of 150 persons, how many were smokers and drinkers?
(I) 80% of the person surveyed were drinkers
(II) 40% of the smokers were drinkers also
Senior Manager
Joined: 30 Aug 2009
Posts: 286
Location: India
Concentration: General Management
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Kudos [?]: 120 [0], given: 5

Re: %'S [#permalink]  12 Dec 2011, 04:02
ashiima wrote:
In a survey of 150 persons, how many were smokers and drinkers?
(I) 80% of the person surveyed were drinkers
(II) 40% of the smokers were drinkers also

We can have a table as below:

drink no drink total
smoke ? = 0.4x x
no smoke
total 120 30 150

stmnt1 - 80% were drinkers = 80% of 150 = 120 but we don't have any info about smokers. hence insuff

stmnt 2 - We do not know the number of smokers so we can't calculate the number of smokers + drinkers. hence insuff

Taking together we know number of drinkers is 120 and 40% of smokers are drinkers as well but no other detail. Hence E
Re: %'S   [#permalink] 12 Dec 2011, 04:02
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