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)?
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)?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.8: Probabilities Of Disjoint And Overlapping Events
Problem 2C
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