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Suppose you have a weighted coin in which heads comes up with probability 3/4 and tails 1/4 with probability . If you flip heads, you win 2 but if you flip tails, you lose 2. What is the expected win of a coin flip in dollars?

 Dec 21, 2021
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(3/4 * 2  - 1/4 * 2 ) / 2  = 1/2 dollar

 Dec 21, 2021

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