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A box contains one each of $1, $5, $10, $20, and $100 bills. It costs $21 to reach in and withdraw one bill. What is the expected value?

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Answer to a math question A box contains one each of $1, $5, $10, $20, and $100 bills. It costs $21 to reach in and withdraw one bill. What is the expected value?

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Bud

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96 Answers

Expected\:value=\operatorname{mean}-21

=\left(\frac{1+5+10+20+100}{5}\right)-21

=6.2

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A box contains one each of $1, $5, $10, $20, and $100 bills. It costs $21 to reach in and withdraw one bill. What is the expected value?

Answer to a math question A box contains one each of $1, $5, $10, $20, and $100 bills. It costs $21 to reach in and withdraw one bill. What is the expected value?

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