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Mathematics 14 Online
OpenStudy (anonymous):

A standard deck of 52 playing cards has 4 suits with 13 different cards in each suit. How many different five-card hands are possible? A) 260 hands B) 2,598,960 hands C) 24,380 hands D) 311,875,200 hands

OpenStudy (anonymous):

what..

OpenStudy (anonymous):

52 choose 5 52 C 5 \(\large 52 \choose 5 \)

OpenStudy (anonymous):

these are different ways to represent the same thing

OpenStudy (mertsj):

How many choices for the first card?

OpenStudy (anonymous):

Are you allowed to use a calculator

OpenStudy (anonymous):

yea

OpenStudy (anonymous):

Using a calculator is kind of cheap. Mertsj do you have a different approach

OpenStudy (anonymous):

you could always use wolfram and type in 52 choose 5

OpenStudy (mertsj):

Yes. There are 52 choices for the first card. There are 51 choices for the second card. There are 50 choices for the third card. There are 49 choices for the fourth card. There are 48 choices for the fifth card. So total possible hands are: 52 x 51 x 50 x 49 x 48 = 311,875,200

OpenStudy (anonymous):

thats an overestimate

OpenStudy (anonymous):

the order does not count when you receive the 5 cards

OpenStudy (anonymous):

is it d?

OpenStudy (anonymous):

its b

OpenStudy (mertsj):

It is D

OpenStudy (anonymous):

example 2H 3H 4H 5H 6H = 3H 2H 4H 5H 6H = ... the order does not count, so you divide by 5!

OpenStudy (mertsj):

Oh yes. The order of selection doesn't matter so divide by 5 x 4 x 3 x 2 x 1

OpenStudy (mertsj):

B

OpenStudy (anonymous):

thanks

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