Solve this:

​Q3. The ages of 10 children who joined the skating camp were 6 years, 6 years, 9 years, 8 years, 7 years 11 years, 9 years, 7 years, 10 years, 8 years. Find the average age.

Q4. In a Maths test , 10 students scored 25 marks each, while 15 students scored 20 marks each. What was the average score of the class ?

Q5. Find the average savings per month if the yearly savings of Rohit is Rs. 1,08,000.

Q6. The sum of seven numbers is 497. What is their average?

Q7. The average weight of 7 girls in 45 kg. If one more girl is included, the average becomes 43 kg. What is the weight of the included girls ?

Q8. The average rainfall for three months is 12 cm. If the rain fall for the first two months is 13 cm and 15 cm respectively, find the rainfall for the third month