Find out the least number of cables required to connect 100 computers to 20 printers to assurance that 20 computers can directly access 20 different printers. Justify your answer.
Ans: The 100 computers and 20 printers can be connected by using concept of a complete bipartite graph K100, 20 to make sure that using minimum number of cable need. This arrangement will need 2000 cables and will make sure that at any time 20 computers can directly access the 20 computers.