question

Given x=2y, we want to know is y=1000.
from 1,
x+y =3000
2y+y=3000
y=1000, hence suff. eliminate B,C,E

From 2
x=2000
put in given eqn..
2y=2000
y=1000

Hence D

What if i have not yet beat the beast, I know i will beat it!!!!!!!!

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rohangupta83: Legendary Member; Posts: 541; Joined: Thu May 31, 2007 6:44 pm; Location: UK; Thanked: 21 times; Followed by:3 members; GMAT Score:680

by rohangupta83 » Tue Nov 25, 2008 8:35 am

x/600 = y/300

or x/2 = y

or x =2y

Statement 1: X + y = 3000

substituting x = 2y in statement 1

we get:

2y + y = 3000
or y=1000 - SUFFICIENT

Statement 2: 3x = 6000
substituting x = 2y

3(2y) = 6000
6y = 6000
y=1000 - SUFFICIENT

imo D

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