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## gmat prep question

This topic has 1 member reply
yvonne12 Master | Next Rank: 500 Posts
Joined
07 Feb 2007
Posted:
144 messages

#### gmat prep question

Thu Apr 12, 2007 11:20 am
Robin split a total of 24k between 2 investments, x and y. If investments y earns 7 percent simploe annual interest, how much of the total did RObin put into investment Y?

I. Each investment earns the same dollar amount of the interest annually

II. Investment X earns 5 percent simple annual interest.

How can both determine the exxact amount in investment y, if we can't say for sure by what amount interest is based on?

ajith Legendary Member
Joined
21 Sep 2006
Posted:
1275 messages
Followed by:
2 members
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Test Date:
April 2010
Target GMAT Score:
740
Thu Apr 12, 2007 9:07 pm
yvonne12 wrote:
Robin split a total of 24k between 2 investments, x and y. If investments y earns 7 percent simploe annual interest, how much of the total did RObin put into investment Y?

I. Each investment earns the same dollar amount of the interest annually

II. Investment X earns 5 percent simple annual interest.

How can both determine the exxact amount in investment y, if we can't say for sure by what amount interest is based on?
Clearly I and II alone are not sufficient
Combining I and II
X*5/100 = Y*7/100

5x=7y
x+y=24k

you can solve these 2 equations and find out the exact Y ...

_________________
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