Please help me with this please
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The two co-captians can be chosen in 21 different ways.
<h3>How many ways are there to choose the co-captains?</h3>
If the two co-capitans are equivalent, then we need to find combinations.
So we want to find how many combinations of 2 elements we can make out of a set of 7 elements.
This is given by:
So the two co-captians can be chosen in 21 different ways.
If you want to learn more about combinations:
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