+1791 A standard deck of cards has $52$ cards divided into $4$ suits, each of which has $13$ cards. Two of the suits ($\heartsuit$ and $\diamondsuit$, called 'hearts' and 'diamonds') are red, the other two ($\spadesuit$ and $\clubsuit$, called 'spades' and 'clubs') are black. The cards in the deck are placed in random order (usually by a process called 'shuffling'). In how many ways can we pick five different cards? (Order matters, thus ace of spades followed by jack of diamonds is different than jack of diamonds followed by ace of spades.)
+36916 52 P 5 = 52! / 47! = 311 875 200 ways to pick 5 cards ( 47 is 52 - 5 )
