(a) Suppose that you choose three coins at random (without replacement) from a bag containing four 20p coins and five 10p coins. (i) Find the probability mass function of the random variable counting the number of 20p coins selected. (ii) Determine the total expected cash value of the three coins you get, giving your answer correct to the nearest penny.
(a) Suppose that you choose three coins at random (without replacement) from a bag containing four 20p coins and five 10p coins. (i) Find the probability mass function of the random variable counting the number of 20p coins selected. (ii) Determine the total expected cash value of the three coins you get, giving your answer correct to the nearest penny.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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