A shopkeeper bough $11$ hair clips for $R s . 10$ and sold for $R s . 11$ . Find his gain percentage.

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Solution

Cost price of 11 hair clips = Rs. 10
Cost price of 1 hair clips = $\frac{10}{11}$ = Rs. 0.909
Selling price of 10 hair clips = Rs 10
Selling price of 1 hair clips = $\frac{10}{10}$ = Rs 1
SP > CP
Gain $= S P - C P = 1 - 0.909 = R s 0.091$
Gain % $= \frac{Gain \times 100}{C P} = \frac{0.091 \times 100}{0.909} = 10.01 % \approx 10 %$

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