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How many telephones lines have to be laid to connect 7 villages directly ?(detailed answer required)?


How many telephones lines have to be laid to connect 7 villages directly ?(detailed answer required)?

This is a networking problem - look up 'Linear Bus', 'Star' or 'Hub', 'Token Ring' and 'Fully Connected Mesh'.

You need 21 for a fully connected topology, but you could do it with far less.

823543

7^7

it needs a large intercom that works on electricity and all should share the same power supply

21

7 factorial = (7x6x5x4x3x2x1) = 5040 telephone lines.

why do u need to know the answer to that question?

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