Decided to calculate how many possible face combinations are available in the child library. This is what I found : r/Petscop
nCr Formula - Derivation, Examples, FAQs
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Solution 34718: Calculating Permutations and Combinations Using the TI-84 Plus C Silver Edition Calculator.
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Calculate nCr using Pascal's Triangle - GeeksforGeeks
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Combination Calculator (nCr Calculator) - Inch Calculator
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NCR 18-16 / Busicom Junior
Unit 0, Session 0.4 Useful Calculator Functions - ppt video online download
