SOLUTION: Please help with the following problems I have tried and I juat can't get the problem. A new virus is released on the internet; the administrator of a department's Local Area Ne

Algebra ->  Linear-equations -> SOLUTION: Please help with the following problems I have tried and I juat can't get the problem. A new virus is released on the internet; the administrator of a department's Local Area Ne      Log On


   

Question 130999: Please help with the following problems I have tried and I juat can't get the problem.
A new virus is released on the internet; the administrator of a department's Local Area Network ( LAN) is given 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 by fners(16) About Me  (Show Source):
You can put this solution on YOUR website!
the answer is 7/12*117. why?
he checked 12, and 7 were infected. instead of checking all the rest, we can assume that the same proportion of all the computers are infected. the proportion is 7 out of 12, or 7/12. 7 twelfths of 117 is 7/12*117.