A boy buys oranges at 3 for Rs.10. He will sell them at 5 for Rs.20. In order to make a profit of Rs.1.00, he must sell
A man buys oranges at Rs 5 a dozen and an equal number at Rs 4 a dozen. He sells them at Rs5.50 a dozen and makes a profit of Rs50. How many oranges does he buy?
A fruit-seller buys oranges at 4 for Rs.3 and sells them at 3 for Rs.4. Find his profit percent.