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

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In a survey of 150 persons, how many were smokers and [#permalink] New post   28 Nov 2003, 23:55
00:00
A
B
C
D
E

Difficulty:

55% (hard)

Question Stats:

60% (01:39) correct 40% (01:10) wrong based on 15 sessions
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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



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E
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Re: In a survey of 150 persons, how many were smokers and [#permalink] New post   29 Nov 2003, 03:28
E

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

Bharathi.
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Re: In a survey of 150 persons, how many were smokers and [#permalink] New post   29 Nov 2003, 20:49
I would say E also.

Because we're not told how many smokers were drinkers, or how many of 150 were drinkers.
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Re: In a survey of 150 persons, how many were smokers and [#permalink] New post   04 Dec 2003, 05:59
Likewise, it is possible that there are people who neither smoke nor drink
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Re: In a survey of 150 persons, how many were smokers and [#permalink] New post   10 Dec 2011, 17:55
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
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Re: In a survey of 150 persons, how many were smokers and [#permalink] New post   12 Dec 2011, 05:02
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



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Re: In a survey of 150 persons, how many were smokers and [#permalink]
12 Dec 2011, 05:02
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