Question

A shopkeeper buys 50 pencils for 80 rupees and sells them at 45 pencils for 90find his gain or loss percent

Answer 1

Answer:

Given total cost = 80 and no. of pencil is = 50.

the cost of 1 pencil is 80/50 = 8/5rs.

now for 40 pencil the cost would be 40*(8/5) = 64 rs

but he sold those at 80rs in total.

so gain % is (80-64)/64 = 16/64 = 25%