Question

A fruit vendor buys oranges at 6 for rs 10 and an equal number at 10 for rsr 20. He mixes them and sells at rsr 21.60 per dozen. Find his gain or loss percent.

Answer 1

cost price of six oranges = rs10
cost price of 1 orange = rs10/6
cost price of 10 orange = rs20
cost price of 1 orange = rs20/10
= rs2
total cost price = rs2+rs10/6
= rs22/6
selling price of 1 dozen = rs 21.60
as we all know that 1 dozen = 12
therefore, selling price of 1 orange = rs 21.60/12
= rs 1.8 or 216/120
as we can see that cost price is greater, therefore loss is made.
loss = cost price - selling price
= 22/6-216/120
= rs 224/120
loss % = loss/cost price ×100 ( it is a formula )
= 224/120/22/6
= 224×6/120×22 ×100
= 50.9%