The average of 8, 13, x, and y is 6. The average of 15, 9, x and x is 8. What is the value of y?

The average of 2, 7, 6 and x is 5 and the average of 18, 1, 6, x and y is 10. What is the value of y ? (a) 5 (b) 10 (c) 20 (d) 30

The average of x, y and z is 8 and the average age of y and z is 4. What is the value of x?

The average of w, x, y, and z is 31. If the average of w and y is 24, what is the average of x and z?

The averge of x and 3y is 12, the average of 2x and 3z is 21. What is the average of x,y and z ?

The average of 8,9,12,13,15,9 is :

If the average of x, y, and z is 32 and the average of y and z is 27. What is the average of x and 2x?

If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the average of 3m and 18, what is the average of x, y, and z in terms of m ?

If the average of x, y, and z is 12, what is the average of 3x, 3y, and 3z?