Average - General Questions

The average marks of a class of 28 students is 50 and that of another class of 38 students is 66. What is the average of all the students together?

What is the average of the first 53 natural numbers?

The average of 16 numbers is 60. When one more number is added, the average becomes 64. What is the new number?

Find the average of 21, 94, 88, 86, 71, 27 and 68.

The average of 17 numbers is 40. When one more number is added, the average becomes 43. What is the new number?