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December 16th, 2011, 07:19 PM  #1 
Newbie Joined: Dec 2011 Posts: 1 Thanks: 0  probability with combination
There are k sets of numbers : {0,1,2,….,m1}, {0,1,2,……..,m2}, …………,{0,1,2,………,mk} Such that m1<m2<………<mk. 1. How many combinations of k elements can be made taken 1 element from each set such that each set has all distinct elements (no two elements are equal) ? 2. What is the probability that any two sets will have at least one element common ? (Please provide procedure and explanation) N.B. : I am looking for number of COMBINATIONS, not PERMUTATIONS i.e., sets with same set of elements (although in different order) will be treated as one. Please name the formula/rule/reference used so that I can learn them. Plz help, it's urgent. 

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combination, probability 
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