The expected value of these group of earning is given as expected value is 3.9
How to solve for expected value
To get the expected value. you first have to multiply the probabilities by their payout
0 * 0.35 = 0
2 * 0.2 = 0.4
4 * 0.1 = 0.4
8 * 0.2 = 1.6
10 * 0.15 = 1.5
The expected value is a summation of all of these values after the multiplication has been done.
Expected value is = 0 + 0.4 + 0.4 + 1.6 + 1.5
= 3.9
Hence the expected value is 3.9
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