A invested some money in 10% stock at 96.If B wants to invest in an equally good 12% stock ,he must purchase a stock worth of : Choose the correct choice from the following choices:
A) rs . 80
B) rs . 115.20
C) rs . 120
D) rs . 125.40
E) none of these

Rationale: explanation : for an income of rs . 10 , investment = rs . 96 . for an income of rs . 12 , investment = ( 96 / 10 x 12 ) = 115.20 answer : b
Answer: B