![]() For meats and cheeses this is now aĬombinations replacement or multichoose problem using the combinations with replacements equation:Ĭ R(n,r) = C(n+r-1, r) = (n+r-1)! / (r! (n - 1)!)įor meats, where the number of objects n = 5 and the number of choices r = 3, we can calculate eitherĬ R(5,3) = 35 or substitute terms and calculate combinations C(n+r-1, r) = C(5+3-1, 3) =Ĭalculating cheese choices in the same way, we now have the total number of possible options for each category atĪnd finally we multiply to find the total Now replacements are allowed, customers can choose any item more than once when they select their portions. In the previous calculation, replacements were not allowed customers had to choose 3 different meats and 2 different cheeses.
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