## gunmate1 Group Title A box contains nine $1 bills, eight$5 bills, two $10 bills, and four$20 bills. What is the expectation if one bill is selected? one year ago one year ago

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1. texaschic101 Group Title

The expectation is probably a $1 bill because there is more of them. There is a total of (9 + 8 + 2 + 4) = 23 bills. The chance of getting a$1 is 9/23, the chance of getting a $5 bill is 8/23, the chance of getting a$10 is 2/23, and the chance of getting a \$20 is 4/23.

2. whpalmer4 Group Title

The expectation (or expected value) is the sum of the probabilities multiplied by the payoffs. So $\frac{9}{23} * 1 + \frac{8}{23}*5 + ...$

3. Skaternerd123 Group Title

1/24