Final answer:
To guarantee that any combination of four computers can be connected to a printer, the least number of cables required is four.
Step-by-step explanation:
The problem is asking for the least number of cables required to connect eight computers to four printers in such a way that any combination of four computers can be connected to a printer. To guarantee this, we need to ensure that each printer is connected to at least four computers and no more than four computers.
Therefore, each computer must be connected to at least one printer, and since there are four printers, we need at least four cables. So, the least number of cables required is four.