Average - General Questions

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

What is the average of the first 38 natural numbers?

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

The average weight of 12 persons increases by 2 kg when a new person replaces one of them weighing 59 kg. What is the weight of the new person?

The average of 20 numbers is 29. When one more number is added, the average becomes 31. What is the new number?