SOLUTION: Mohan bought a certain number of notebooks for Rs. 600. He sold � of them at 5% loss. At what price should he sell the remaining note books so as to gain 10% on the whole.

Question 986075: Mohan bought a certain number of notebooks for Rs. 600. He sold � of them at 5% loss. At what price should he sell the remaining note books so as to gain 10% on the whole.
Answer by srinivas.g(540) (Show Source): You can put this solution on YOUR website!
let total no of books be 100
cost of each book = 600/100
= 6
He sold � of them at 5% loss
i.e he sold 25 ( 1/4 of 100 =25) books for 5 % loss
so he sold each notebook at = 6-5% of 6
=
=
=
=5.7
so he sold each book at Rs 5.7
total amount he got after selling 25 books @5.7 = 25*5.7
= 142.5
he wants to get 10 % Profit on the whole
the amount he should get = 600+ 10 % of 600
= 600+(10/100)*600
= 600+60
=660
already he got Rs 142.5
so needs to get remaining (660-142.5) amount by selling 75 books
selling price of 75 book should be = 660-142.5
= 517.5
selling price of each book =517.5/75
= 6.9
Result :he should sell the remaining books at Rs 6.9 per book

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