Question 765640
Andrew has seven 20 cent coins and five 50 cent coins in his piggy bank. What is the smallest number of coins he might have to shake out of his piggy bank to be certain of having two 50 cent coins? 
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The first 7 coins might be 20 cent pieces.  
The next 2 must be 50 cent pieces.
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Answer:: 9
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Ches,
Stan H.
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