Question 355239
No. of queen in deck = 4

no. of cards other than queen = 48

no. of ways to select 7 cards from 52 = 52C7

no. of ways to select 7 cards from 48 = 48C7


probability of no queen = 48C7 / 52C7


=  4257/7735

now, the probability of at least one queen = 1 - 4257/7735 


= 3478/7735

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