IBPS PO RRB PO Prelims 5 Aug 2023 Shift 1 Paper

A and B invested Rs. 6000 and Rs. 12000 respectively in a business. After 6 months C joined and B left 9 months after the starting of the business. If the profit share of C at the end of the year is Rs. 18900 out of the total profit which is Rs. 50400, then find the amount invested by C?