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Railways PYQCBT 1 2016

RRB NTPC · Question 64

A shopkeeper cheats to the extent of 9% while buying and selling fruits, by using tampered weights. His total gain in percentage is: A. 18.25 B. 18.81 C. 19.78 D. 18.5

  1. B

  2. C

  3. A

  4. D

Show answer & explanation

Answer: (A) B

Explanation

Cheating by 9% while buying, he gets 109 g for the price of 100 g; cheating by 9% while selling, he charges for 109 g but gives only 100 g. The combined gain = 1.09 × 1.09 − 1 = 0.1881 = 18.81%.