Answer:
$11
Step-by-step explanation:

We want to calculate the expected gain or loss of Stock ABC with the probabilities above.
Note that loss is written in negative.

Stock ABC has an expected gain of $11.
Answer:
A.
Step-by-step explanation:
m = y2-y1/x2-x1
m = 12-4/15-5
m = 8/10
m = 4/5