If you have n objects and you are choosing r of them, then there are nCr combinations. This is equal to n!/( r! * (n-r)! ).
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Evaluate when m = 30.5 kg and k = 3.5 m
The word evaluate simply means 'find the value of...' For example, if asked to evaluate 23x4, the answer is 92.
They are called combinations!
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