An article in Information Security Technical Report [Malicious SoftwarePast, Present and Future (2004, Vol. 9, pp. 618)]

Question:

An article in Information Security Technical Report [€œMalicious Software€”Past, Present and Future€ (2004, Vol. 9, pp. 6€“18)] provided the following data on the top 10 malicious software instances for 2002. The clear leader in the number of registered incidences for the year 2002 was the Internet worm €œKlez,€ and it is still one of the most widespread threats. This virus was first detected on 26 October 2001, and it has held the top spot among malicious software for the longest period in the history of virology.

The 10 most widespread malicious programs for 2002

% Instances Place Name 1 I-Worm.Klez 61.22% 2 I-Worm.Lentin 20.52% I-Worm. Tanatos 2.09% 4 I-Worm.BadtransII 1.31% Macro

Suppose that 20 malicious software instances are reported.

Assume that the malicious sources can be assumed to be independent.

(a) What is the probability that at least one instance is €œKlez?€

(b) What is the probability that three or more instances are €œKlez?€

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Applied Statistics And Probability For Engineers

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6th Edition

Authors: Douglas C. Montgomery, George C. Runger

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Question Posted: Jun 13, 2018 06:46 AM

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An article in Information Security Technical Report [Malicious SoftwarePast, Present and Future (2004, Vol. 9, pp. 618)]

Question:

% Instances Place Name 1 I-Worm.Klez 61.22% 2 I-Worm.Lentin 20.52% I-Worm. Tanatos 2.09% 4 I-Worm.BadtransII 1.31% Macro. Word97.Thus 5 1.19% I-Worm.Hybris 0.60% I-Worm.Bridex 0.32% 8. I-Worm.Magistr 0.30% Win95.CIH 0.27% 10 I-Worm.Sircam 0.24%

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Applied Statistics And Probability For Engineers

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