In a partnership, A and B start a business by investing ₹20,000 and ₹25,000 respectively. After 4 months, C joins them with ₹15,000. Find the ratio of their profits at the end of the year.
A mixture contains milk and water in the ratio 5:2. If 4 litres of water is added, the ratio becomes 5:4. Find the initial quantity of milk in the mixture.
What is the new ratio of seats in Mathematics, Physics, and Biology in a school if the original ratio 5:7:8 is increased by 40%, 50%, and 75% respectively?