Hello ,
As per the Formula for Communication Channel=n(n-1)/2
And the Answer to the question below is bit confusing
Kindly clarify the same

Diana is leading a project which has 12 team members .Stacy is leading another project which is been executed from 3 different locations and has 6 team members each. Both these projects are part of a program managed by Soa.
Soa decides to move two of Dianna's team members into Statcy project and reduce Stacy's team by half.How many communications channels has dianna reducing in total in her program?

252
234
204
212

Your solution also bit confusing.