Situation: An Internet café has 20 personal computers (PC), but eight of these have unlicensed software installed in them, while the other 12 contain genuine software packages. An antipiracy team randomly selects three of the 20 PCs for inspection. A) What is the probability that the Internet café will be caught for using unlicensed software? B) If X is the number of PCs with unlicensed software out of the sample of three PCs, what is E(X)? C) What is Var(X)?

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Situation: An Internet café has 20 personal computers (PC), but eight of these have unlicensed
software installed in them, while the other 12 contain genuine software packages. An antipiracy
team randomly selects three of the 20 PCs for inspection.
A) What is the probability that the Internet café will be caught for using unlicensed software?
B) If X is the number of PCs with unlicensed software out of the sample of three PCs, what is E(X)?
C) What is Var(X)?
Transcribed Image Text:Situation: An Internet café has 20 personal computers (PC), but eight of these have unlicensed software installed in them, while the other 12 contain genuine software packages. An antipiracy team randomly selects three of the 20 PCs for inspection. A) What is the probability that the Internet café will be caught for using unlicensed software? B) If X is the number of PCs with unlicensed software out of the sample of three PCs, what is E(X)? C) What is Var(X)?
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