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How many unique combinations of 3 products can be made from 5 products. Repetitions are allowed (ex 1,1,1 or 1,1,2 etc)but since these are products for sale, groupings such as 1,2,3 & 3,2,1 are not allowed because both groups contain the same products and are not unique.

user768390
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1 Answers1

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I think that what you are looking for is the number of multisets of cardinality $3$ with elements taken from a set of cardinality $5$.

pegasus
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