Posted by B1nary on Thursday, March 14, 2013 at 7:58pm.
I will assume you are drawing one card
number of favourable outcomes
= 4 kings + 4 queens + 26 black cards - 2black kings - 2black queens
= 30
prob(king or queen or black card ) = 30/52 = 15/26
spade or hearts = 13 + 4 - 1 = 16
prob = 16/52 = 4/13
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