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1. Each of the integers from 0 to 9, inclusive, is written on a separate slip of blank paper and the ten slips are dropped into a hat. If the slips are then drawn one at a time without replacement, how many must be drawn to ensure that the numbers on two of the slips drawn will have a sum of 10?

User Jgadelange
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1 Answer

5 votes

Answer:

5, assuming you get the worst possible slips off: 0,1,2,3,4

Explanation:

User Tiffane
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