Question

4.5 and 5 are respectively the average of 2sets of number 3, 4, x, y and 2x, y, 4, 3, find the value of x, y

​

Answer 1

Explanation:

4.5 * 4 = 18.

3 + 4 + x + y = 18, x + y = 11.

5 * 4 = 20

2x + y + 4 + 3 = 20, 2x + y = 13

Hence, x = 2 and y = 9.