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If a commission at the rate of 10% is given to a bookseller on the marked price of a book by the publisher, the publisher gains 20%. If the commission is increased to 15%, then the gain percent would be:
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16 2 % 3 -
13 2 % 3 -
15 5 % 6 -
12 2 % 2
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Correct Option: B
Let Marked price of book = Rs. y
and C.P. of a book = Rs. 100
According to the question,
| = 120 | 100 |
| ⇒ y = | = Rs. | 90 | 3 |
If commission be 15%, then
| S.P. = | × | = | 3 | 100 | 3 |
S.P. = Rs. 113.33
Gain = 113.33 - 100 = 13.33
| ∴ Gain % = 13 | % | 3 |
