Sample size 52 cards, Event is to pull one 9 (without replacement)
There are 4 (9's) in a card deck
P(pulling 9) = 4/52 = 1/13 =
After having pulled one 9, there are 3 9's left & obviously 51 cards
P(pulling again a 9) = 3/51
P( pulling one 9 AND AGAIN one 9) = (1/13) x (3/51) = 1/221 = 0.0045
