Four friends A, B, C and D made investments in a business in the ratio 3 ∶ 7 ∶ 9 ∶ 13, respectively. If the share of the profit of C is Rs. 8,910, then what is the total share of the profits of A and B?
1
Rs. 9,900
2
Rs. 11,880
3
Rs. 2,970
4
Rs. 6,930