Question

If a commission of $10$% is given on MP of book , the publisher gains $20$% . If the commission is increase to $20$% , the gain % is?

• A. $5$
• B. $6.66$
• C. $3.33$
• D. $8$

Answer 1

The correct option is B $6.66$

$S.P=M.P-$commission$\times M.P$

$S.P=C.P+$ gain$\times C.P$

Let $C.P=Rs.100$

For gain $=20\%,S.P=Rs.120$

and commission$=10\%,MP=Rs.133.33$

For commission$=20\%$ and $M.P=Rs133.33$

$S.P=Rs.106.66$

$C.P=Rs.100$

$⟹$ gain$=\frac{S.P-C.P}{C.P}\times 100=6.66\%$