Question 1050806
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Hi  
13C1  Ways of choosing the 3 of a kind types: Aces or whatever
4C3   choosing 3 of the 4 Aces
12C1  Ways of choosing the 2 of a kind types: Kings or whatever
4C2   CHOOSING 2 OF THE 4 Kings
52C5  Ways of choosing 5 cards out of the deck
P(3Aces & 2Kings) = {{{((13C1)(4C3)(12C1)(4C2))/(52C5)}}} = 3744/2598960 = 234/ 162435
Use Calculator for nCx  
0r
Note: {{{nCx = (n!)/x!(n - x)!)}}}