A and B started a partnership business investing some amount in the ratio of 3 : 5. C joined then after six months with an amount equal to that of B. In what proportion should the profit at the end of one year be distributed among A, B and C?
Choose the most appropriate option:
A) 3 : 5 : 2 B) 3 : 5 : 5 C) 6 : 10 : 5 D) 5:8:10 E) Data inadequate
Let the initial investments of A and B be 3x and 5x.   A : B : 6 : 10 : 5 = (3x x 12) : (5x x 12) : (5x x 6) = 36 : 60 : 30 = 6 : 10 : 5.
<result>C</result>
A and B started a partnership business investing some amount in the ratio of 3 : 5. C joined then after six months with an amount equal to that of B. In what proportion should the profit at the end of one year be distributed among A, B and C?