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GMAT Prep Practice Test Question 4

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weipei Junior | Next Rank: 30 Posts Default Avatar
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Posted:
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GMAT Prep Practice Test Question 4

Post Fri May 04, 2007 11:00 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    Over a certain time period, did the number of shares of stock in Ruth's portfolio increase?

    1. Over the time period, the ratio of the number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased.

    2. Over the time period, the total number of shares of stocks and bonds in Ruth's portfolio increased.

    Can someone explain this problem? Not sure how to form an equation.

    Thanks!

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    jayhawk2001 Community Manager
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    Post Sat May 05, 2007 8:05 am
    weipei wrote:
    Over a certain time period, did the number of shares of stock in Ruth's portfolio increase?

    1. Over the time period, the ratio of the number of shares of stock to the total number of shares of stocks and bonds in Ruth's portfolio increased.

    2. Over the time period, the total number of shares of stocks and bonds in Ruth's portfolio increased.

    Can someone explain this problem? Not sure how to form an equation.

    Thanks!
    Is it C?

    1 - insufficient.
    s / (s+b) increased. This could be because s increased or b decreased

    2 - insufficient.
    s+b increased. s increased or b increased

    Taking 1 and 2, if s+b increased and s/(s+b) increased, then the only
    way is if numerator s increased.

    Hence C

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