Mathematics
Mathematics, 24.08.2021 22:30, belen1266

15. Three cards are chosen at random from a stack of 7 baseball cards. Two are rookie cards. How many ways can: A) three cards be selected?
B) 3 cards be chosen so at least one card is a rookie card?
C) 3 cards be chosen so EXACTLY one is a rookie?
D) 3 cards be chosen so BOTH rookies are included?

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