SOLUTION: if five men A,B,C,D,E speak at a meeting ,in how many ways can they do so without B speaking before A?

Question 934506: if five men A,B,C,D,E speak at a meeting ,in how many ways can they do so without B speaking before A?
Answer by AnlytcPhil(1806) (Show Source): You can put this solution on YOUR website!

There are 5! orders they can speak in with no restrictions.  In exactly half of
those 5! ways, A speaks before B and half of those 5! B speaks before A.

Answer: 

Edwin

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