I only need someone to check my answers.

Question

Find the expected value of a random variable X having the following probability distribution:

x -15 -1 0 1 5 8
p (x=x) .12 .16 .28 .22 .12 .10

E(X) = (-5) * (.12) + (-1) *(.16) + (0) * (.28) + (1) * (.22) + (5) (.12) + (8) (.10) = .86

Answer 1

You evaluated E(X) correctly,
but not if the first data value is in fact -15, and not -5.

Answer 2

Oops i meant -5 for the table value.