If the average age of 10 boys in a class is 13 years, the sum of their ages would be:

What is the average number of students in B.Tech (220), M.Tech (140), and B.A (4344) courses together?

A class has two sections A and B, which have 36 and 44 students respectively. If the average weight of section A is 40 kg and that of section B is 35 kg, find the average weight of the whole class.

Find the average investment in Agriculture sector and Defence sector if the investments in the two sectors are Rs. 22,00,000 and Rs. 15,00,000 respectively.

What is the average amount (in ₹ crore) of the total revenue generated by selling all four products in 2015 and 2016?

The average of 9 numbers is 19. The average of 6 of these numbers is 15. What is the average of the remaining 3 numbers?

The average of 8 numbers is 55. If each number is increased by 4, what will the new average be?

The average of 13 numbers is 29. If each number is multiplied by 2, what will be the new average?

The average price of three articles of furniture is ₹16,350. If their prices are in the ratio 3 : 5 : 7, find the price (in ₹) of the cheapest article.