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प्रश्न
By selling 300 lunch boxes, a shopkeeper gains the selling price of 100 lunch boxes. Find his gain percentage.
उत्तर
Let ₹ x be the selling price (S.P.) of one lunch box.
∴ S.P. of 300 lunch boxes = 300x
and S.P. of 100 lunch boxes = 100x
Gain = 100x ...........…[given]
C.P. of 300 lunch boxes = S.P. – Gain
= 300x − 100x
= 200x
Profit% = `("Profit" xx 100)/"C.P."`
Profit% = `(100"x")/(200"x") xx 100 = 50`
∴ Shopkeeper’s gain percentage is 50%.
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