Mathematics, 08.08.2019 04:10, ajime

Counting sub-multisets 1. (a). how many solutions are there in nonnegative integers of a + b + c + d = 10?
(b). how many solutions are there in positive integers of a + b + c + d = 10?
(c). how many solutions are there in positive integers of a + b + c + d ? 10?
(d). how many solutions are there in positive even integers of a + b + c + d = 30?

Answers: 2

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Counting sub-multisets 1. (a). how many solutions are there in nonnegative integers of a + b + c + d...