Question

A7. The marked price of a book is
400. In a bookshop, all students get a discount of 15% on the
book. If the shopkeep
er earns a profit of 10% on the book, find the cost price of the book.​

Answer 1

Step-by-step explanation:

M.P of the book = 400

Discount = 15%

S.P of the book

$= 400 - 15\% \: of \: 400 \\ = 400 - \frac{15}{100} \times 400 \\ = 400 - 60 \\ = 340$

S.P = 340

Profit% = 10%

$cost \: price \: = \frac{100}{110} \times 340 \\ = 309.09 \: rupees$

Om Namah Shivaya

Debasish Biswal