If a man lost 10% by selling oranges at the rate of 10 a rupee at how many a rupee must he sell them to gain 50%?	Choose the correct choice:	A) 6	B) 8	C) 7	D) 4	E) 2

Rationale: "90 % - - - - 10 150 % - - - - ? 90 / 150 * 10 = 6 answer : a"
Answer: A