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If x/y = c/d and

This topic has 2 member replies
boomgoesthegmat Senior | Next Rank: 100 Posts Default Avatar
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If x/y = c/d and

Post Wed May 04, 2016 4:41 am
Elapsed Time: 00:00
  • Lap #[LAPCOUNT] ([LAPTIME])
    If x/y = c/d and d/c = b/a , which of the following must be true?

    I. y/x = b/a
    II. x/a = y/b
    III. y/a = x/b

    A) I only
    B) II only
    C) I and II only
    D) I and III only
    E) 1, II and III

    OA: C

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    Post Wed May 04, 2016 6:32 am
    boomgoesthegmat wrote:
    If x/y = c/d and d/c = b/a , which of the following must be true?

    I. y/x = b/a
    II. x/a = y/b
    III. y/a = x/b

    A) I only
    B) II only
    C) I and II only
    D) I and III only
    E) 1, II and III

    OA: C
    I found it easy to assign actual numbers and then test the answers, for example:

    4/2 = 6/3 and

    3/6 = 5/10

    by substituting each of these into the answer choices, it becomes clear

    Thanked by: boomgoesthegmat
    boomgoesthegmat Senior | Next Rank: 100 Posts Default Avatar
    Joined
    25 Apr 2016
    Posted:
    93 messages
    Thanked:
    1 times
    Post Thu May 05, 2016 8:40 pm
    Nice solution regor60!

    Anyone out there have any other ways to solve it or is that the best way?

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