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14 August, 01:51

Twenty switches in an office computer network are to be connected so that each switch has a direct connection to exactly three other switches. How many connections will be necessary?

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  1. 14 August, 03:20
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    30 connections

    Step-by-step explanation:

    20 switches with 3 connections each will have a total of 20*3 = 60 connections. That counts each connecting link twice, so only 30 connecting links are required.
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