A new virus is released on the internet; the administrator of a department's Local Area Network ( LAN) is giv

Question

five minutes by a manager to estimate the impact. The administrator samples 12 of the PCs connected to the LAN, and finds that 7 are infected; use proportion to estimate the number of infected PCs if there are a total of 117 PCs connected to the LAN.

Answer 1

68.25

If 7 in every 12 is infected and there are 117 total connected you simply divide 117 by 12 then multiply the answer by 7 and voila. I don't know much about percentages or averages, but this is a simple question.