A starts business with Rs. 3500 and after 5 months, B joins with A as his partner. After a year, the profit is divided in the ratio 2 : 3. What is B's contribution in the capital? Choose the correct choice from the following
A) rs . 9228
B) rs . 9129
C) rs . 9120
D) rs . 9000
E) rs . 1922

Rationale: let b ' s capital be rs . x . { 3500 \ 12 } / { 7 x } = { 2 } / { 3 } = > x = 9000 . answer : d
Answer: D