A fruit seller sells mangoes at the rate of Rs.12 per kg and thereby loses 10%. At what price per kg, he should have sold them to make a profit of 15%?  Choose the correct choice from the following answers
A) rs . 11.81	B) rs . 12	C) rs . 15.33	D) rs . 12.31	E) none

Rationale: "solution 90 : 12 = 115 : x x = ( 12 ã — 115 / 90 ) = rs . 15.33 hence , s . p per kg = rs . 15.33 answer c"
Answer: C