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As of June 1st, Team X had won 40 percent of the...

This topic has 1 expert reply and 0 member replies

As of June 1st, Team X had won 40 percent of the...

Post Tue Nov 07, 2017 12:13 pm
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    As of June 1st, Team X had won 40 percent of the 45 games it had played so far during this season. What percent of all its games this season did Team X win (there are no ties permissible)?

    1) Team X won 1/2 of its remaining games this season (after June 1st).
    2) Team X played 64 games after June 1st.

    The OA is C.

    I'm really confused with this DS question. Please, can any expert assist me with it? 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 Tue Nov 07, 2017 7:11 pm
    Hi LUANDATO,

    We're told that Team X won 40 percent of the 45 games it has played so far during this season. We're asked for the percent of all its games that Team X wins in total (there are no ties permissible).

    To start, we know that of the first 45 games, 40% of them (18 games) were wins. To answer this question, we'll need information that helps to determine the number of ADDITIONAL games played and the number of ADDITIONAL wins.

    1) Team X won 1/2 of its remaining games this season.

    The information in Fact 1 essentially creates a 'weighted average', based on the total number of games that Fact 1 describes. In the prompt, we're told that 40% of the initial games were won; here, we're told that 50% of the remaining games are won. The smaller the number of additional games, the closer the average will be to 40%; the larger the number of additional games, the closer the average will be to 50%. Thus, there are a variety of different answers to the question.
    Fact 1 is INSUFFICIENT

    2) Team X played 64 games after June 1st.

    Fact 2 gives us the overall TOTAL number of games (45 + 64 = 109 total games), but we don't know the number of additional wins in these 64 games.
    Fact 2 is INSUFFICIENT

    Combined, we know the total number of games played (109) and the total number of wins (18 + half of 64 = 50). Thus, the answer IS 50/109.
    Combined, SUFFICIENT

    Final Answer: C

    GMAT assassins aren't born, they're made,
    Rich

    _________________
    Contact Rich at Rich.C@empowergmat.com

    Thanked by: LUANDATO

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