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Out of the students in a certain college, 60% study more

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Out of the students in a certain college, 60% study more [#permalink] New post 12 Sep 2008, 05:49
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Out of the students in a certain college, 60% study more than 20 hours a week and 35% hold a full time job. What is the proportion of students that study more than 20 hours a week and hold a full time job ?

(1) 12% of the students study less than 20 hours and don't hold a full time job
(2) 28% of the students study less than 20 hours and hold a full time job
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Re: Zumit DS 021 [#permalink] New post 14 Sep 2008, 02:37
dancinggeometry wrote:
Out of the students in a certain college, 60% study more than 20 hours a week and 35% hold a full time job. What is the proportion of students that study more than 20 hours a week and hold a full time job ?

(1) 12% of the students study less than 20 hours and don't hold a full time job
(2) 28% of the students study less than 20 hours and hold a full time job


IMO B

since 35%of the students hold full job (this includes those studying >20hrs +<20 hrs ) hence with (2) data known we can calculate answer
35-28=7% is the answer
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Re: Zumit DS 021 [#permalink] New post 14 Sep 2008, 02:38
spriya wrote:
dancinggeometry wrote:
Out of the students in a certain college, 60% study more than 20 hours a week and 35% hold a full time job. What is the proportion of students that study more than 20 hours a week and hold a full time job ?

(1) 12% of the students study less than 20 hours and don't hold a full time job
(2) 28% of the students study less than 20 hours and hold a full time job


IMO B

since 35%of the students hold full job (this includes those studying >20hrs +<20 hrs ) hence with (2) data known we can calculate answer
35-28=7% is the answer


oops (1) also helps
I messed up
IMO D
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Re: Zumit DS 021   [#permalink] 14 Sep 2008, 02:38
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