A, B and C invested Rs.6300, Rs.4200 and Rs.10500 respectively, in a partnership business. Find the share of A in profit of Rs.12400 after a year?
Choose the most appropriate option:
A) 3630  B) 2881  C) 3720  D) 9977  E) 2212

Rationale: "6300 : 4200 : 10500 3 : 2 : 5 3 / 10 * 12400 = 3720 . answer : c"
Answer: C