Question 867517
the probability will be 1 / 6P3 which is equal to 1/120.


there are 6P3 possible number of ordered arrangement of sets of 3 cards taken from 6.


6P3 is the formula for the permutation of 6 things taken 3 at a time.  


that equals 6! / 3! which is equal to 6*5*4 which is equal to 120.


a permutation is an ordered arrangement.


the general formula for a permutation of n things taken x at a time is:


nPx = n! / (n-x)!


when n = 6 and x = 3, this becomes 6P3 = 6! / (6-3)! which becomes 6! / 3!.