Problem #3 · QuantSpell

PROBLEM #3

Five white cards and four black cards are shuffled into a row. A group consists of one or more consecutive cards of the same color. For example, in the row BBWWWBBWW, the black cards form two groups. What is the probability that the black cards form exactly three groups?

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PROBLEM #3

Five white cards and four black cards are shuffled into a row. A group consists of one or more consecutive cards of the same color. For example, in the row BBWWWBBWW, the black cards form two groups. What is the probability that the black cards form exactly three groups?

Printing is disabled during an exam.