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GRE Math Challenge #28-sum of b and c
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07 Sep 2014, 06:44
07 Sep 2014, 06:44
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Question Stats:
77% (00:58) correct
22% (01:03) wrong based on 22 sessions
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If a is equal to the sum of b and c, which of the following is difference of b and c?
A. a - b- c
B. a – b +c
C. a – c
D. a – 2c
E. a – b – 2c
A. a - b- c
B. a – b +c
C. a – c
D. a – 2c
E. a – b – 2c
Re: GRE Math Challenge #28-sum of b and c
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16 Jan 2018, 01:08
16 Jan 2018, 01:08
thought it should be A, would you explain?
Re: GRE Math Challenge #28-sum of b and c
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16 Jan 2018, 10:40
16 Jan 2018, 10:40
It is b-2c
+>
a=b+c
a-2c=b+c-2c
b-c
+>
a=b+c
a-2c=b+c-2c
b-c
