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Unformatted text preview: rank that we have 4 of and then 12 ways to pick the rank we have one of, so
the answer is
44
41
13 · 12
.
52
5
An example. What is the probability that in a poker hand we get exactly
3 of a kind (and he other two cards are of diﬀerent ranks)?
Answer: The probability of 3 aces, 1 king and 1 queen is
52
. We have 13 choices for the rank we have 3 of and
5
the other two ranks, so the answer is 13 12
2 4
3 19 4
1
52
5 4
1 . 4
3
12
2 4
1 4
1 choices for ...
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 Spring '10
 ansan
 Probability

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