SOLUTION: can someone help me I'm 60 years old and I really don't understand this problem please please help. thank you : Ratio and Proportion A new virus is released on the intern

Question 170101This question is from textbook elementary and Intermediate algebra concepts and application
: can someone help me I'm 60 years old and I really don't understand this problem please please help. thank you
: Ratio and Proportion

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 15 of the PCs connected to the LAN, and finds that 9 are infected; use proportion to estimate the number of infected PCs if there are a total of 202 PCs connected to the LAN. This question is from textbook elementary and Intermediate algebra concepts and application

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
This was already solved, I copied it fro Stan H, or stanbon.
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Use a proportion:
[9 infected/15 sampled] = [x infected/all the PCs]
(9/15) = (x/202)
x = 202(9/15)
x = 202(3/5)
x = 121.2
Round down to get x = 121 infected PC's out of 202
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