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Eduardwww [97]
3 years ago
5

Five cards are dealt from 52.

Mathematics
1 answer:
icang [17]3 years ago
5 0

For reference,

\dbinom nk=\dfrac{n!}{k!(n-k)!}

a. \dbinom{52}5=2,598,960 - nothing special here, you're just choosing any 5 cards from the deck

b. \dbinom{13}4\dbinom{39}1=27,885 - 13 hearts to choose from, and 39 of any other suit

c. \dbinom{40}5=658,008 - there are 12 face cards to omit from the count

d. \dbinom{26}5=65,780 - half the deck contains spades/clubs

e. \dbinom{26}5=65,780 - essentially the same situtation as (d)

f. \dbinom{40}5\dbinom{12}0+\dbinom{40}4\dbinom{12}1+\dbinom{40}3\dbinom{12}2=2,406,768 - either 0, 1, or 2 face cards are allowed

g. \dbinom{13}2\dbinom{39}3+\dbinom{13}3\dbinom{39}2+\dbinom{13}4\dbinom{39}1+\dbinom{13}5\dbinom{39}0=953,940 - similar to (f)

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