Answer:
-$5.06
Step-by-step explanation:
Given the probability distribution of X where X is the net gain or loss

The expected value of X is defined as follows:
Expected Value of X, 
Therefore, the expected value of the player
E(X)=(6*0.21)+(-8*0.79)
=1.26-6.32

The expected value of each player at the casino is -$5.06.
Convert 9 1/2 into a mixed fraction: 19/2.
Now, multiply with 6 which in fraction form is 6/1
19/2 times 6/1 equals 114/2
Now you can divide 114/2 which is 57 inches squared.
Have a good day ! :)
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