If x : y = 3 : 2 and x + y = 90. Then the value 7 (x – y) : (x + y) is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e 7 : 5
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Understanding Tricks |
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Application x : y = 3 : 2 and x + y = 90 So (3 + 2) unit = 90 1 unit = 18 |
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Now x = 54 and 36 |
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Hence 7(x – y) : (x + y) = 7(54 – 36) : (54 + 36) = 7(18) : (90) = 7 : 5 |