1.

1). 62). 53). 44). 3

Answer»

Let the required number be x

⇒ 40 = $(\left( {\FRAC{{7\; \TIMES \;1}}{{x\; \times \;1\;}} - \;1} \RIGHT))$ × 100

⇒ 2/5 = 7/x - 1

⇒ 2/5 + 1 = 7/x = 7/5 = 7/x

⇒ x = 5

∴ He has to sell 5 pair of clips for a rupee to get PROFIT of 40%



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