Question

By selling 12 pens for a rupee a man losses 20%. for how many pens a rupee should he sell to gain 20% profit?​

Answer 1

Answer:

SP = 100/12 paise

Let's CP = x

SP = 0.8x = 100/12

∴ x = 10/(0.8x12) paise

Therefore, CP = 100/9.6 paise

Thus the new SP (with 20% profit) = 100/9.6 X 1.2 = 100/8 paise

Hence, 8 pens can be purchased for Rs.1 to gain 20%

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Answer 2

Answer:

8 pens can be purchased for Rs .1 to gain 20 %