GMAT Prep DS Question 2... Confusion

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GMAT Prep DS Question 2... Confusion

by dhanda.arun » Sat Sep 27, 2008 1:39 pm
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Hi all,
According to me the answer should be D but Original Answer is A.

Kindly explain

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by 4meonly » Sun Sep 28, 2008 2:48 am
I think the best approach to such questions is to draw a number line

AC = 5, BC = 20
C between A and B?

(1)
AB=25

on the Number line:
A.....5....C.....................20........B
Only in such case you will get AB = 25, so c between A and B
SUFF


(2)
A to the left of B

can be
C....5......A...........15.......B

or

A.....5....C.....................20........B
INSUFF

A