Question

give me answer fastly.
A shopkeeper buys 100 pens for ruppes 10 each and sells 20 of them at a gain of 10% .What percent he sells the remaining so as to gain 20% in all
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Answer 1

100 pens rs 10 each = 100•10=1000 total

sells 20 of them , 20•10=200 & gains 10% remaining 1000-200 = 800

sorry ni aara eske aage try Kiya bt hua ni mere se