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qazpt: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Thu Dec 10, 2009 3:04 pm; Thanked: 2 times

by qazpt » Fri Dec 11, 2009 12:47 pm

1. DS Groups: From a class, 180 students take either math or science. 120 take math and 100 take science. How many took math but not science?

(A) 50 took science but not math.

(B) 75 took only science.

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Source: Beat The GMAT — Data Sufficiency | Fri Dec 11, 2009 12:47 pm

eshank: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Thu Aug 27, 2009 1:42 pm

by eshank » Sat Dec 12, 2009 2:51 am

qazpt wrote:1. DS Groups: From a class, 180 students take either math or science. 120 take math and 100 take science. How many took math but not science?

(A) 50 took science but not math.

(B) 75 took only science.

it can be solved the answer is D, however the answer from the statements is different..

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adamsmith2009: Senior | Next Rank: 100 Posts; Posts: 36; Joined: Fri Mar 27, 2009 6:53 pm

by adamsmith2009 » Mon Dec 14, 2009 6:57 am

I don't understand how it could be solved with either. Can someone explain. Thanks.

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