Question

The selling price of 12 pen equal to the cost priceof 15 pen . find the gain per cent

Answer 1

Answer:

let the cp of 1 pen be rs 1

then, cp of 12 pens = rs 12

and given, sp of 12 pens = cp of 15 pens = rs 15

then gain = 15- 12 = 3

gain % = (3/cp) × 100 = (3/12)×100 = 25%

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