Question

59) The average of x, y, z and 40 is 10. What is the average of x, y and z? A.10 C. 2 D. 15 B. 0 Maine MET​

Answer 1

$x + y + z + 40 \div 4 = 10$

$x + y + z + 40 = 10 \times 4$

$x + y + z + 40 = 40$

$x + y + z = 40 - 40$

$x + y + z = 0$

The answer is 0