Why are combination formulas of this form always equal, nCx = nC(n-x)

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In this video, we explain why nCx = nC(n-x). In other words, we explain why something like 10C3 must always be the same as 10C7.

  1. Dane McGuckian
  2. combination formula
  3. permutations and combinations problems
  4. why nCx equals nCn-x
  5. combinatorics and combinations
  6. counting subsets
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