Mathematics, 08.02.2021 23:20 talahtoo6659

A new computer virus can enter the system through e-mail or through the internet. There is a 25% chance of receiving this virus through e-mail. There is a 55% chance of receiving it through the internet. Also, the virus enters the system simultaneously through e-mail and the internet with probability .1. What is the probability that the virus does not enter the system at all?

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