petrushkagoogol Posted September 23, 2018 Report Share Posted September 23, 2018 If I (A) invite 2 friends (B and C) in any social network to be connections the number of valid connections is : 3P2 + 3P0 i.e. AB, AC, BC, ABC Generalizing - nPm + nP0 WHERE n = Target size of the Networkm = 2 (Restricting interaction of A with one friend at a time) Is this correct ? . Quote Link to comment Share on other sites More sharing options...
Vmedvil2 Posted September 23, 2018 Report Share Posted September 23, 2018 What does P and P0 stand for? Quote Link to comment Share on other sites More sharing options...
petrushkagoogol Posted September 24, 2018 Author Report Share Posted September 24, 2018 What does P and P0 stand for? nPr = Permutation of n things taken r at a time Quote Link to comment Share on other sites More sharing options...
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