Question

Imran bought two books for rupees 1500.The cost of one book is rupees 300 more than the other.He sold the expensive book at a loss of 10% and the other at a profit of 15%.find his net gain or loss percent

Answer 1

let the cost of other book be 1500-300=1200
SP of 1st book = 100-10/100*300
=270
the SP of 2nd book = 120/100*1200
=240*6
=1440
total SP = 270 + 1440
=1710
gain = 1710-1500
=210
gain℅=210*100/1500
=14℅. ans





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Answer 2

x = cost of more expensive book

 

y = subtotal cost of the other books

 

x = 50% more than y, so x = 1.50y = 1.5y

 

x + y = total cost = $150

 

1.5y + y = 150

 

y = 150/2.5 = 60

 

x = 1.5y = 1.5(60) = 90

 

The more expensive book cost $90, the other two combined cost $60.