Question

52 cards, pull one card without replacing the card then pull second card. how do you calculate the probability that both cards you pull are 9s?

Answer 1

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