Tossing a coin
there are only 2 possible outcome’s, head or tail
drawing 3 cards from a deck of cards without replacement is an example permutation because order matters .and each draw reduces the no of remaining cards by 1
We use formula for nPr = n !/n-r !
Whee n= 52
r=3
n! Is the factorial
22,100
therefore sample size is 2*22100=44,200