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At a certain hospital, 75% of the interns receive fewer than

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SVP
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At a certain hospital, 75% of the interns receive fewer than [#permalink] New post 24 Mar 2008, 15:37
At a certain hospital, 75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts. At the same time, 70% of the interns who receive 6 or more hours of sleep report no feelings of tiredness. If 80% of the interns receive fewer than 6 hours of sleep, what percent of the interns report no feelings of tiredness during their shifts?

A) 6
B) 14
C) 19
D) 20
E) 81
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Re: Tired Interns [#permalink] New post 24 Mar 2008, 22:24
terp06 wrote:
At a certain hospital, 75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts. At the same time, 70% of the interns who receive 6 or more hours of sleep report no feelings of tiredness. If 80% of the interns receive fewer than 6 hours of sleep, what percent of the interns report no feelings of tiredness during their shifts?

A) 6
B) 14
C) 19
D) 20
E) 81


questions like this one is pretty confusing and I do not get any difference between "75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts" and "80% of the interns receive fewer than 6 hours of sleep".

huh............
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Re: Tired Interns [#permalink] New post 25 Mar 2008, 00:34
GMAT TIGER wrote:
terp06 wrote:
At a certain hospital, 75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts. At the same time, 70% of the interns who receive 6 or more hours of sleep report no feelings of tiredness. If 80% of the interns receive fewer than 6 hours of sleep, what percent of the interns report no feelings of tiredness during their shifts?

A) 6
B) 14
C) 19
D) 20
E) 81


questions like this one is pretty confusing and I do not get any difference between "75% of the interns receive fewer than 6 hours of sleep and report feeling tired during their shifts" and "80% of the interns receive fewer than 6 hours of sleep".

huh............


yep true!

If the first condition were 75% of the interns who receive fewer than 6 hours... the ans would be 70% of (100% - 80%) which is 14%

If the condition is as it is stated, it's a bumble!
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Re: Tired Interns [#permalink] New post 25 Mar 2008, 15:57
80% get fewer than 6 hrs and dont feel tired ?
Re: Tired Interns   [#permalink] 25 Mar 2008, 15:57
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