value of b?

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sanju09: GMAT Instructor; Posts: 3650; Joined: Wed Jan 21, 2009 4:27 am; Location: India; Thanked: 267 times; Followed by:80 members; GMAT Score:760

value of b?

by sanju09 » Fri Mar 20, 2009 3:20 am

What is the value of b?

(1) a = 3

(2) (a - 3) (b + 2) = 0

OA after few posts

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Source: Beat The GMAT — Data Sufficiency | Fri Mar 20, 2009 3:20 am

Tryingmybest: Master | Next Rank: 500 Posts; Posts: 168; Joined: Thu Nov 13, 2008 4:34 am; Location: Pittsburgh; Thanked: 9 times

by Tryingmybest » Fri Mar 20, 2009 7:07 am

IMO B.

A is insufficient as we dont know anything about b

(a - 3) (b + 2) = 0
=> a= 3 or b=-2

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Morgoth: Master | Next Rank: 500 Posts; Posts: 316; Joined: Mon Sep 22, 2008 12:04 am; Thanked: 36 times; Followed by:1 members

Re: value of b?

by Morgoth » Fri Mar 20, 2009 2:59 pm

sanju09 wrote:What is the value of b?

(1) a = 3

(2) (a - 3) (b + 2) = 0

OA after few posts

Statement I

a=3

nothing about b

Insufficient

Statement II

either a=3 or b=-2

Insufficient

Combining I & II

a = 3

(3-3) (b+2) = 0

b could be any value since a-3 = 0

Insufficient

Hence E.