Partnership - General Questions

A invests Rs. 9,000 for 12 months and B invests Rs. 5,000 for 4 months. In what ratio should they share the profit?

A, B and C invest in the ratio 4 : 5 : 6 for the same period. If the total profit is Rs. 13,500, what is C's share?

A starts a business with Rs. 8,000. After 7 months B joins with Rs. 7,000. Out of a total annual profit of Rs. 13,100, what is A's share?