Question

Joey recorded the monthly change in his saving account balance, in dollars, for 5 months. His balance change each month was: -10,5, 55, -15, -20 What is the average monthly change in Joey's saving account balance?

Answer 1

His balance change each month are

-10, 5, 55, -15, -20

we need to re arrange in the ascending order

-20, -15, -10, 5, 55

Average = sum of all the numbers / total numbers

total numbers = 5

sum = -20 + (-15) + (-10) + 5 + 55

sum = -20 - 15 - 10 + 5 + 55

sum = -45 + 5 + 55

sum = 15

Average = 15 / 5

Average = 3

The answer is 3