A, B and C started a business each investing ₹25,000. After the fourth month, A withdraws ₹3,000, B withdraws ₹4,000, and C invests ₹3,000 more. At the end of the year, if the total profit was ₹3,80,835, then C's share of the profit (in ₹) is:

Three partners invested in a business in the ratio 8:5:4. They invested their capital for 3 months, 10 months, and 9 months respectively. What was the ratio of their profits?

A started a business with an investment of ₹21,000 and after a few months, B joined him with an investment of ₹15,000. At the end of the year, the total profit was divided between them in the ratio 12 : 5. After how many months did B join the business?