Question

A shopkeeper buys 50 pencils for 80 rupees and sells them at 40 pencils for 90find his gain or loss percent

Answer 1

cost price of 50 pencils = ₹80

selling price of 40 pencils =₹90

Then, selling price of one pencil

= 90/40 =₹2.25

selling price of 50 pencils =2.25×50= ₹112.50

As , SP is more , we have profit.

Then , Profit = sp-cp

=₹ 112.50 - ₹80

= ₹ 32.50

So, profit%= 32.50/80 ×100

= 325/8%

Answer 2

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%

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