Question 392107
total 52 cards, 12 cards are face cards

no. of ways to select at least 3 face cards in 5 cards 

 = 12C3 * 40C2 + 12C4 * 40C1 + 12C5 * 40C0



no. of ways to select 5 cards from 52 cards = 52C5


probability of at least 3 face cards = 

(12C3 * 40C2 + 12C4 * 40C1 + 12C5 * 40C0 ) / 52C5