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A fruit seller buys some apples at the rate of 4 for $ 10 and an equal number more at 5 for $ 10. He sells the whole lot at 9 for $ 20. What is his loss or gain percent?
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Loss percent 1 19 % 81 -
Gain percent 1 19 % 81 - No loss or no profit
- Loss percent 2%
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Correct Option: A
∵ LCM of 4 and 5 = 20
Let 20 apples of each type be bought.
C.P. at the rate of 4 apples = $ 10
| C.P. of an apple of first type = $ | 4 |
C.P. at the rate of 5 apples = $ 10
| C.P. of an apple of second type = $ | 5 |
| C.P. of 40 apples = $ |  | 20 × | 10 | + 20 × | 10 |  | = $ 90 | |
| 4 | 5 |
| Total S.P. = | = $ | 9 | 9 |
Loss = C.P. of 40 apples - S.P. of 40 apples
| Loss = 90 - | = | 9 | 9 |
| Loss percent = | = 1 | % | 81 | 81 |
