A began business with Rs.45000 and was joined afterwards by B with Rs.27000. When did B join if the profits at the end of the year were divided in the ratio of 2:1?  Choose the correct choice from the following answers
A) 1 B) 6 C) 7 D) 8 E) 2

Rationale: "45 * 12 : 27 * x = 2 : 1 x = 10 12 - 10 = 2 answer : e"
Answer: E