Cards from an ordinary deck of 52 playing cards are turned face up one at a time. If the 1st card is an acc, or the 2nd a deuce, or the 3rd a three, or ..., or the 13th a king, or the 14 an ace, and so on, we say that a match occurs. Note that we do not require that the (13n + 1) card be any particular ace for a match to occur but only that it be an ace. Compute the expected number of matches that occur.
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