Here's the best way to solve it. Expert-verified P(Virus enters via webpage or email) = P(Webpage) + P(Email) - P(Both) = 0.30 +0.40 -0.15 = 0.55 Hence, 100% (6 ratings) P(Virus does not enter) = 1 - P(Virus enters via webpage or email) = 1-0.55 = 0.45 Was this solution helpful? R 口介

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Q: How did you figure out the answers? Can you show your work

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