Reading up on Schuette–Nesbitt formula (from actuary math) which is a generalization of the inclusion-exclusion principle which is an example of a sieve and while it’s used for probability, is really Combinatorial and here’s the kind of questions it’s used for:

Reading up on Schuette–Nesbitt formula (from actuary math) which is a generalization of the inclusion-exclusion principle which is an example of a sieve and while it’s used for probability, is really Combinatorial and here’s the kind of questions it’s used for:

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