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Question

A tea party is arranged for 16 people along two sides of a long table with 8 chairs on each side. Four men wish to sit on one particular side and two on the other side, In how many ways can they be seated?

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Solution

The four persons who wish to occupy side A can be accommodated on eight chairs in
8P4=8!4!=8×7×6×5 ways.
The two persons who wish to occupy side B can be accommodated on eight chairs in
8P2=8!6!=8×7 ways.

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