CSC Company Numerical Ability Profit and Loss

The marked price of a book is 20% more than the cost price. After the book is sold, the vendor realizes that he had wrongly raised the cost price by a margin of 25%. If the marked price of the book is Rs.30, what is the original cost price of the book?

a) Rs.30 b) Rs.25 c) Rs.45 d) Rs.20

Read Solution (Total 1)

Let the incorrect cost price be C1 and let the original cost price be C2.
Marked price of book is Rs.30. It is 20% more than C1.

Therefore, (120/100) X C1 = 30
Or C1 = 25.
C1 is more than C2 margin of 25%.
Or C1 = (125/100)C2
Therefore, C2 = (100/125) x 25 = Rs 20
12 years agoHelpfull: Yes(2) No(2)

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