Question

Anil bought certain number of books at the rate of 12 books for Rs 18 and sold them at the rate of 18 books for Rs 30.Find his profit `//`loss percentage
A. `9.(1)/(1)%`
B. `10%`
C. `11.(1)/(9)%`
D. `12.(1)/(2)%`

Answer 1

Correct Answer - C
while caculating the profit `//` loss percentage we must consider equal number of books beings bought and sold.
The cost price of each book `=Rs (18)/(12)=Rs .(3)/(2)`
The selling price of each book `= Rs (30)/(18) =Rs .(5)/(3)`
As `(3)/(2) lt (5)/(3) ` a profit is made
Profit `% = ((5)/(2)-(3)/((2)/(3)x) xx (100%)`
`=((1)/(6))/((3)/(2))xx (100%) =11.(1)/(9)%`