which is greater, b or c?

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farooq: Master | Next Rank: 500 Posts; Posts: 140; Joined: Sat Feb 28, 2009 8:51 amFollowed by: 3 members; Location: India; Thanked: 14 times

by farooq » Sat May 16, 2009 3:52 am

Q: If ab<ac; which is greater, b or c?

Statement 1: a<0
Statement 2: c<0

A
B
C
D
E

Answer : A

Regards,
Farooq Farooqui.
London. UK

It is your Attitude, not your Aptitude, that determines your Altitude.

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Source: Beat The GMAT — Data Sufficiency | Sat May 16, 2009 3:52 am

ssmiles08: Master | Next Rank: 500 Posts; Posts: 472; Joined: Sun Mar 29, 2009 6:54 pm; Thanked: 56 times

by ssmiles08 » Sat May 16, 2009 6:01 am

This is how I approached it:

if a < 0

Then (-a)(b)< (-a)(c)

when you divide both sides by (-) you would get b>c since dividing by a negative sign switches the inequalities.

In this case it doesn't matter what numbers b and c because you are not dividing anything by b or c

If c < 0 , a can be pos or neg. So when you divide by a positive a you get b<c and when you divide by a negative a you would get b>c. So Ans choice B does not work

It is A

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