A man buys oranges at Rs 5 a dozen and an equal number at Rs 4 a dozen. He sells them at Rs 5.50 a dozen and makes a profit of Rs 50. How many oranges does he buy? Choose the correct option
A) 30 dozens	B) 40 dozens	C) 50 dozens	D) 60 dozens	E) 70 dozens
Explanation:   Cost Price of 2 dozen oranges Rs. (5 + 4) = Rs. 9.   Sell price of 2 dozen oranges = Rs. 11.   If profit is Rs 2, oranges bought = 2 dozen.   If profit is Rs. 50, oranges bought = (2/2) * 50= 
<gadget id="calculator">(2/2) * 50</gadget>
<output>50</output>
50 dozens. Answer: 50 dozens
<result>C</result>
A man buys oranges at Rs 5 a dozen and an equal number at Rs 4 a dozen. He sells them at Rs 5.50 a dozen and makes a profit of Rs 50. How many oranges does he buy?