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The least number of computers required to connect 10 computers to 5 routers to guarantee 5 computers can directly access 5 routers is ______(a) 74(b) 104(c) 30(d) 67The question was asked in semester exam.My question comes from Counting topic in section Counting of Discrete Mathematics

Answer» RIGHT answer is (c) 30

The explanation: Since each 5 COMPUTER need DIRECTLY CONNECTED with each router. So 25 connections + now remaining 5 computer, each connected to 5 different routers, so 5connections = 30 connections. Hence,


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