Question

If the S.P. of $Rs.24$ results in a $20\%$ discount on the list price, what S.P. would result in a $30\%$ discount on list price?

• A. $Rs.18$
• B. $Rs.20$
• C. $Rs.21$
• D. $Rs.27$

Answer 1

The correct option is C $Rs.21$

Let the list price=100 Rs.
discount =20% in list price then
$S.P.=100-20=80Rs.$
If S.P. is 80 Rs then list price=100 Rs.
If S.P.is 24 Rs then list price=$\frac{100}{80}\times 24=30Rs.$
30% discount on list price then
30% of 30=$\frac{30}{100}\times 30=9Rs.$
Then S.P.=$30-9=21Rs.$