Question

What is the average of -30 -15 -20 55

Answer 1

Answer:

${ \tt{ = \frac{ (- 30) + ( - 15) + ( - 20) + 55}{4} }} \\ \\ = { \tt{ \frac{ - 10}{4} }} \\ \\ = { \tt{ - \frac{5}{2} }}$