Areteem: Question on II-A 8.27

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Question on II-A 8.27

MC II-B Week 7 Extension
AIME Workshop Advanced Combo Answer Key

What do "a four of a kind " and "exactly one pair" mean in the context of this problem? Same/different suit? Same/different rank?

Four of a kind means four cards with the same rank. Exactly one pair means a pair of cards with the same rank, and no two other cards with the same rank.

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MC II-B Week 7 Extension
AIME Workshop Advanced Combo Answer Key