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

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New post 28 Nov 2003, 22:55
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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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New post 29 Nov 2003, 02:28
E

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

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New post 29 Nov 2003, 19:49
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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New post 04 Dec 2003, 04:59
Likewise, it is possible that there are people who neither smoke nor drink
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New post 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
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New post 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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In a survey of 150 persons, how many were smokers and

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