Question

If a commission $20$% given on the marked price of a book, the publisher gain $60$% . If the commission is not there, the gain of publisher is

• A. $100$
• B. $90$
• C. $60$
• D. $80$

Answer 1

The correct option is A $100$

Let discount be $D$

$SP=MP-D\times MP$

for $D=20\%$

$SP=(1-0.2)\times MP=0.8MP$

Again

Gain$=\frac{SP-CP}{CP}\times 100$

For gain$=60\%$ and $SP=0.8MP$

$CP=MP/2$

If $D=0$

$SP=MP$ and $CP=MP/2$

$⟹$Gain$=\frac{SP-CP}{CP}\times 100=100\%$