364.Before the Two of Hearts
★★★classical probabilityCh. 1 — Classical Probability and Combinatorics444+ Problems in Probability
A well-shuffled deck of cards is dealt one by one until the two of hearts appears. Find the probability that no kings, queens, or jacks appear before the two of hearts.
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Only 13 cards matter: the two of hearts and the 12 face cards. What must be true of their relative order?
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