BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

milk

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 1153
Joined: Wed Jun 20, 2007 6:21 am
Thanked: 146 times
Followed by:2 members

by parallel_chase » Tue Sep 09, 2008 3:48 pm
x+2y+3z = 1.5(x+y+z)

x+2y+3z = 1.5x+1.5y+1.5z

.5y + 1.5z = .5x

y+3z = x

Hence A is the answer.
Top
Senior | Next Rank: 100 Posts
Posts: 58
Joined: Fri Apr 04, 2008 12:36 pm
Thanked: 4 times
GMAT Score:680

by mim3 » Thu Sep 11, 2008 12:08 pm
Alternative method:

I found values for x,y and z that when combined came out to an average of 1.5. If:

1% x=1
2% y=1
3% z=0

then (x+y)/2= 1.5

So, pluggint the values into the answer choices knowing that x=1, which equation also equals 1?

A) y+3z= x
1+ 3(0)= 1

That works. A is the answer.
Top
Post new topic Post Reply
• Page 1 of 1