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A hiker in a national forest stopped at a ranger...

This topic has 1 expert reply and 0 member replies

A hiker in a national forest stopped at a ranger...

Post Fri Nov 10, 2017 1:58 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    A hiker in a national forest stopped at a ranger station to add to her canteen. How many ounces of water were in the canteen when she arrived at the ranger station?

    1) The hiker added 24 ounces to the canteen at the ranger station.
    2) After the hiker added water to the canteen, the canteen was 75 percent full.

    The OA is E.

    Please, can any expert assist me with this DS question? I'm really confused with it and I need your help. Thanks in advanced.

    Need free GMAT or MBA advice from an expert? Register for Beat The GMAT now and post your question in these forums!
    Post Mon Nov 13, 2017 2:30 pm
    LUANDATO wrote:
    A hiker in a national forest stopped at a ranger station to add to her canteen. How many ounces of water were in the canteen when she arrived at the ranger station?

    1) The hiker added 24 ounces to the canteen at the ranger station.
    2) After the hiker added water to the canteen, the canteen was 75 percent full.
    Target question: How many ounces of water were in the canteen when she arrived at the ranger station?

    Statement 1: The hiker added 24 ounces to the canteen at the ranger station.
    This information doesn't help us determine the volume of water in the canteen when the hiker arrived.
    Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT

    Statement 2: After the hiker added water to the canteen, the canteen was 75 percent full
    This information doesn't help us determine the volume of water in the canteen when the hiker arrived.
    Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

    Statements 1 and 2 combined
    There are several possible scenarios that satisfy BOTH statements. Here are two:
    Case a: The hiker had 0 ounces of water when she arrived, and the canteen has a capacity of 32 ounces. So, after adding 24 ounces of water to the canteen, it now holds 24 ounces of water. 24/32 = 75%, so all of the conditions are satisfied in this scenario. In this case the hiker had 0 ounces of water when she arrived
    Case b: The hiker had 6 ounces of water when she arrived, and the canteen has a capacity of 40 ounces. So, after adding 24 ounces of water to the canteen, it now holds 30 ounces of water. 30/40 = 75%, so all of the conditions are satisfied in this scenario. In this case the hiker had 6 ounces of water when she arrived
    Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

    Answer: E

    Cheers,
    Brent

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