A new virus is released on the internet?

Question

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.

Answer 1

9/15=X/202, cross-multiply to solve for X.

Answer 2

~121.  It doesn't come out evenly, like 121.2.

Answer 3

I have this same math problem, this is what I did:

9/15 = x / 202

I then cross multiplied and got:

15x = 1818

15x / 15 = 1818 / 15

x = 121.2

I hope that this is right!