Q. A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?
a. 3
b. 4
c. 5
d. 6
C.P. of 6 toffees = Re. 1
S.P. of 6 toffees = 120% of Re. 1 = Rs. 6/5
For Rs. 6/5, toffees sold = 6. For re. 1.
Toffees sold = 6 * 5/6 = 5
