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Michael has 3 quarters, 2 dimes, and 3 nickels in his pocket. He randomly draws two coins from his pocket, one at a time, and they are both dimes. He says the probability of that occurring is 1/4 because 2 of the 8 coins are dimes. Is he correct? Explain.

 Jul 16, 2020
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He is incorrect, the first time he drawsa coin there is a 1/4 chance of him pulling a dime.  The second time he draws there is a 1/7 chance of him pulling a dime.  This means there is a 1/4x1/7=1/28 chance of him getting two dimes.

 Jul 16, 2020

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