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6 March, 01:29

15. Which one of the following statements expresses a true proportion?

A. 3 : 5 = 12 : 20

B. 14 : 6 = 28 : 18

C. 42 : 7 = 6 : 2

D. 2 : 3 = 3 : 2

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Answers (2)
  1. 6 March, 03:46
    0
    If we write the ratios vertically and then cross multiply:

    A) 3*20 = 5 * 15

    60 = 60

    B) 14 * 18 = 6 * 28

    252 ≠ 168

    C) 42 * 2 = 7 * 6

    84 ≠ 42

    D) 2 * 2 = 3 * 3

    4 ≠ 9

    Answer: A)
  2. 6 March, 04:13
    0
    Only ratio in A. is the same in both statements, as multiplying or dividing both of them by the same factor will not make a difference.
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