A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 80%?
Choices:
A) 10.8 B) 20.8 C) 28.8 D) 18.8 E) 17.8
C.P. of 6 toffees = Re. 1   S.P. of 6 toffees = 480% of Re. 1 = Rs.24/5   For Rs. 24/5 , toffees sold = 6.   For Re. 1, toffees sold = 6 x 24/5 =28.8.   Answer 28.8
<result>C</result>
A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 80%?