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Question

What is the number of ways of choosing 4 cards from a pack of 52 playing cards? In how many of these four cards belong to four different suits.

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Solution

Total No.of cards to be chosen no.of ways.
Diamond 13 1 13c1
spade 13 1 13c1
Heart 13 1 13c1
Club 13 1 13c1
Since they are the same case,
So,we can multiply the number of ways.
Hence the required no.of ways choosing
four cards form each suit= 13c1×13c1×13c1×13c1
=(13c1)4

=(13!11(131)!)4

=(13×12!12!4)

=(13)4

=28561 ways.


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