Question: n n . Explain in words why the equation is true. n - k n Use the definition 77! k!(n-k)! to show that the equation

 n n . Explain in words why the equation is true.

n n . Explain in words why the equation is true. n - k n Use the definition 77! k!(n-k)! to show that the equation in question (1) is true. k

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