If 15 oranges are bought for a rupee, how many must be sold for a rupee to gain 25%?  Choose the correct choice from the following:
A) 12	B) 10	C) 20	D) 18	E) None of these
C.P. for one orange = 1⁄15   Then S.P. = 100+25/100×1/15=125/100×15=1/12   Hence S.P. for one orange = 1⁄12   ∴ 12 oranges must be sold for a rupee   12nswer 12
<result>A</result>
If 15 oranges are bought for a rupee, how many must be sold for a rupee to gain 25%?