Math Problems

Is equivalent to "a choose b", or - the number of ways you can choose b items from a set of a elements if you don't care about order.


They're related to Pascal's triangle directly via the bth element in the ath row, for the binomial probability bit. Noting of course that a = 0, 1, 2, ..., while b = 0, 1, ..., a, and taking the identity 0c0 = 1