Question

The amounts below show the change (measured in feet) in water level over four months. What is the average monthly change in water level?

2/5,−4/5, 9/5, 1/5

Answer 1

What you want to do is add the probabilities up and divide by how many there are so it will be 0.4+1.8+0.2-0.8/4
Which is 0.35

Answer 2

Answer:

0.35

Step-by-step explanation:

You need to do this by turning all of those into a decimal and then add them up!