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Mathematics, 07.04.2020 15:22 ayoismeisalex

The New York Metropolitan area has nine major professional sports teams: Mets (M), Yankees (Y), Knicks (K), Rangers (R), Devils (D), Nets (N), Islanders (I), Giants (G), Jets (J)
Marra’s Sporting Goods is going to randomly pick three teams to feature in its next advertisement.
Part A
How many samples of size 3 are possible?
Part B
How many samples of size 3, taken without replacement, include the Mets and Jets?

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