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put this solution on YOUR website!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
x/117 = 7/12
x = (7/12)*117
x = 68.25
Rounded down the estimated number of infected PCs is 68
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Cheers,
Stan H.