What should be subtracted from 15, 28, 20 and 38 so that the remaining numbers may be proportional? (M.A.T… · ABC26GN2938
Subject: General Aptitude · Chapter: Ratio and Proportion
What should be subtracted from 15, 28, 20 and 38 so that the remaining numbers may be proportional? (M.A.T., 2009)
Answer
No answer key was printed for this question.
Explanation
Let the required number be x. 15 – x 20 – x Then, = 28 – x 38 – x ⇔ (15 – x) (38 – x) = (20 – x) (28 – x) ⇔ 570 – 53x + x2 = 560 – 48x + x2 ⇔ 5x = 10 ⇔ x = 2. Hence, required number = 2.
Explanation as extracted from the printed page; notation may be imperfect.
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