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gmat prep question

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

gmat prep question

Post Thu Apr 12, 2007 11:20 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    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?
    please explain

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    ajith Legendary Member
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    Post 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?
    please explain
    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 ...

    Rolling Eyes

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