A student buys a pen for ₹90 and sells it for ₹100.find gain and gain %.

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Solution

C.P of pen = Rs.90

S.P of pen = Rs. 100

Gain = SP-CP

= 100-90 = 10

Gain % = gain * 100/C.P

= 10(100/90)

= 11.11 %

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