In a game, you win 67 dollars with probability 20% and 22 dollars with probability 30%. What is the expected value?

**Choice B is the best answer.** E = 67(0.2) + 22(0.3) = 13.4 + 6.6 = 20 dollars

**Choice B is the best answer.** E = 67(0.2) + 22(0.3) = 13.4 + 6.6 = 20 dollars

Set 3: Probability (Advanced)

Explanation

Answer: B

PROBLEM

In a game, you win $67 with probability 20% and $22 with probability 30%. What is the expected value?

✓ Correct

Choice B is the best answer. E = 67(0.2) + 22(0.3) = 13.4 + 6.6 = $20

Why others are wrong:

A: 40 is incorrect because it does not satisfy the equation.

C: 15 is incorrect because it does not satisfy the equation.

D: 25 is incorrect because it does not satisfy the equation.

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