The average of 11 number is 10. When one number is eliminated, the average of the remaining numbers is 9.3. What is the eliminated number?

The average of 50 numbers is 30. If two numbers are 35 and 40 then the average of the remaining numbers is

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

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number ?

The average of 11 numbers is 7. If every number is doubled, what will be the new average of the numbers?