Question

A vendor bought $6$ toffees for a rupee. How many toffees for a rupee must he sell to gain $20\%$?

Answer 1

C.P. of $6$ toffees = Rs. $1$

S.P. of $6$ toffees $=120\%$ of Rs. $1=$ Rs. $\frac{6}{5}$

S.P of $1$ toffee for a gain of $20\%=6\times$ $\frac{5}{6}$ $=5$