By what per cent above the cost price should a dealer mark a pen so that after allowing a discount of 4% he gains 20%?
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Answer:
25%
Assume the original price as 100, then
Marked price=100+25% of 100=125
Price with discount=125-4% of 125
=125-5=120
the gain=20 which is the 20% of the original price
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