You are dealt a hand of three cards, one at a time. Find the probability of each of the following.
a) The first red card you get is the third card dealt.
b) Your cards are all hearts.
c) You get no clubs.
d) You have at least one king.
Combination formula: nCr = n!/(r! x (n-r)!)
a) Number of red cards = 26
Number of black cards = 26
P(the first red card you get is the third card dealt) = P(first 2 cards are black) x P(third card from remaining 50 is red)
= 26/52 x 25/51 x 26/50
= 0.12745
b) Number of hearts = 13
P(all are hearts) = 13C3 / 52C3
= 286/22,100
= 0.01294
c) Number of non-clubs = 52 - 13 = 39
P(no clubs) = 39C3/52C3
= 0.41353
d) Number of kings = 4
Number of non-kings = 52 - 4 = 48
P(at least one king) = 1 - P(no kings)
= 1 - 48C3/52C3
= 1 - 0.78562
= 0.21738
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