The average (arithmetic mean) of 8 numbers is 65. If one of the numbers, 65, removed, what is the average of the remaining 7 numbers?

The average (arithemetic mean) of a set of seven numbers is 81. If one of the numbers is discarded, the average of the remaining number is 78. What is the value of the number that was discarded?

The average (arithmetic mean) of three numbers is 57. If one of the numbers is 16, what is the sum of the other two?

The sum of 8 numbers is 168. If one of the numbers is 28, what is the average of the other 7 numbers?

The average of 8 numbers is 14. The average of 6 of these numbers is 16. What is the average of the remaining two numbers?

The average of 7 numbers is 48. The sum of five numbers is 250. What is the average of remaining two numbers?

The mean of 17 numbers is 12. If two numbers 9 and 15 are removed, then what will be the mean of remaining number?