Question

Concept 15
39. A man buys a certain number of orange at 20 for Rs
60 and an equal number at 30 for RS 60. He mixes
them and sells them at 25 for Rs 60. What is gain or
loss per cent?

Answer 1

let the no. of oranges bought be x
case1:
cost of 20 oranges=60
cost of 1 orange=60÷20=rs 3/orange
cost of x oranges=3x
case2:
cost of 30 oranges = 60
cost of 1 orange=2
cost of x oranges= 2x
thus,
total cp= 2x+3x=5x
now,
sp of 25 oranges= 60
sp of 1 orange= 60÷25=2.4
sp of x oranges =2.4x
loss = 5x -2.4x=2.6x
loss percent= 2.6x/5x. ×. 100
=2.6×20=52%