Difference between revisions of "1995 IMO Problems/Problem 6"

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==Problem==
 
Let <math>p</math> be an odd prime number. How many <math>p</math>-element subsets <math>A</math> of <math>{1,2,\ldots,2p}</math> are there, the sum of whose elements is divisible by <math>p</math>?
 
Let <math>p</math> be an odd prime number. How many <math>p</math>-element subsets <math>A</math> of <math>{1,2,\ldots,2p}</math> are there, the sum of whose elements is divisible by <math>p</math>?
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==Solution==
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{{solution}}
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==See Also==
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{{IMO box|year=1995|num-b=5|after=Last Question}}

Latest revision as of 21:39, 4 July 2024

Problem

Let $p$ be an odd prime number. How many $p$-element subsets $A$ of ${1,2,\ldots,2p}$ are there, the sum of whose elements is divisible by $p$?

Solution

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See Also

1995 IMO (Problems) • Resources
Preceded by
Problem 5
1 2 3 4 5 6 Followed by
Last Question
All IMO Problems and Solutions