Question

By selling 12 marbles for a rupee, a shopkeeper loses 20%. In order to gain 20% in the transaction, he should sell the marbles at the rate of how many marbles for a rupee?

Answer 1

sp of 12 marbles =1 , loss =20%

therefore cp of 12 marbles

1/0.8=Rs 1.25

Now sp of 12 marbles at a gain of 20%

CP×1.2=1.25×1.2=RS1.5

it means in order to gain 20% he should sell 12 marbles for RS1.5

e.g For Rs1 he should sell 12/1.5=8marbles.

Therefore he should sell the marbles at the rate of Rs8 .

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