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# A total of 20 interns and 15 full-time employees work in the

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Intern
Joined: 11 Nov 2007
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A total of 20 interns and 15 full-time employees work in the [#permalink]

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20 Nov 2007, 08:35
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

8. A total of 20 interns and 15 full-time employees work in the 35 offices
of a company, with one person working in each office. One office is
selected at random to get an upgraded desk. What is the probability
that the office selected will be that of a female intern?
(1) Of the interns, 15 of them are female.
(2) Of the interns, 5 of them are male.

OA is D but i am not able to understand..details of interns is given in both the choices but what about full time employees ?? Source : Princeton Review
Senior Manager
Joined: 06 Mar 2006
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20 Nov 2007, 10:27
The question ask you for the probability of female intern, therefore you do not need to know anything about full time employees.
Director
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Re: an illogical question !!! please check it [#permalink]

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20 Nov 2007, 12:45
ravi_taneja_1977 wrote:
8. A total of 20 interns and 15 full-time employees work in the 35 offices of a company, with one person working in each office. One office is selected at random to get an upgraded desk. What is the probability that the office selected will be that of a female intern?

(1) Of the interns, 15 of them are female.
(2) Of the interns, 5 of them are male.

OA is D but i am not able to understand..details of interns is given in both the choices but what about full time employees ?? Source : Princeton Review

why do you think it is illogicle?

it should be D as each st alone provides sufficient information to answer the probability that the office selected will be that of a female intern.

(1) p = 15/35
(2) p = (20 - 5)/35 = 15/35
Re: an illogical question !!! please check it   [#permalink] 20 Nov 2007, 12:45
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# A total of 20 interns and 15 full-time employees work in the

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