Let A = {1, 2, 3, 4, 5, 6, 7, 8, 9}. (a) How many permutations of size 5 of the elements of A contains exactly 2 even nu

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answerhappygod
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Let A = {1, 2, 3, 4, 5, 6, 7, 8, 9}. (a) How many permutations of size 5 of the elements of A contains exactly 2 even nu

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Let A = {1, 2, 3, 4, 5, 6, 7, 8, 9}.
(a) How many permutations of size 5 of the elements of A
contains exactly 2 even number and 3 odd numbers?
(b) How many subsets contain exactly 2 even numbers and 3
odd numbers?
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