Question

Five delegates P, Q, R, S and T are forwarding their files to one another. P sends his file to Q, S and T, T sends his files to R while P and R exchange their files with each other. Q sends his file to S who sends his files to T. If P has to forward his files to R, then in how many ways P can forward files to R?

A.
Two
B.
Three
C.
Four
D.
One

Accepted Answer

C. The possible paths from P to R are: 1) P -> R 2) P -> Q -> S -> T -> R 3) P -> S -> T -> R 4) P -> T -> R Thus, there are 4 ways.

File Forwarding Paths

Explanation

Practise this under exam conditions