Average - General Questions

The average of 15 numbers is 24. When one more number is added, the average becomes 29. What is the new number?

Find the average of 16, 49, 30, 77, 98, 61 and 12.

The average weight of 8 persons increases by 3 kg when a new person replaces one of them weighing 59 kg. What is the weight of the new person?

The average of 13 numbers is 28. When one more number is added, the average becomes 31. What is the new number?

The average of 9 numbers is 42. When one more number is added, the average becomes 46. What is the new number?