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Suppose that there are 10 dimes, 15 nickels and 8 quarters in a bag and one coin is drawn from the bag. what is the expected value of the draw in dollars? (round to the nearest cent.)

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musiclover10045
total the dollar value of all the coins:

10 dimes = 10 * 0.10 = $1.00
15 nickels = 15 * 0.05 = $0.75
8 quarters =  8 * 0.25 = $2.00

 total value: 2.00 + 1.00 + 0.75 = $3.75

 total coins:  10 + 15 +8 = 33

expected value = total value / total coins:

3.75 / 33 = $0.11


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