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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?
From the given data, we can cmpile the following table
This table represents that Sender P will send files to Q R S and T
The various ways of transferring files from to PR is
1)PR
2)PQSTR
3)PSTR
4)PTR
Hence 4 ways..
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