Question: Let A = {1, 2, 3, 4, 5, 7, 8, 10, 11, 14, 17, 18}. a) How many subsets of A contain six elements? b)

Let A = {1, 2, 3, 4, 5, 7, 8, 10, 11, 14, 17, 18}.
a) How many subsets of A contain six elements?
b) How many six-element subsets of A contain four even integers and two odd integers?
c) How many subsets of A contain only odd integers?

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