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340f_fall09

# 340f_fall09 - 1 Suppose that the three inspectors at a lm...

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1. Suppose that the three inspectors at a film factory are supposed to stamp the expiration data on each package of film at the end of assembly line. John , who stamps 25% of the packages, fails to stamp the expiration date once in every 200 packages, Tom , who stamps 60% of the packages, fails to stamp the expiration date once in every 100 packages, Jeff, who stamps 15% of the packages, fails to stamp the expiration date once in every 90 packages. If a customer complains that her package does not show the expiration date, what is the probability that was inspected by John? 2.Ten people are randomly seated at round table. What is the prob- ability that a particular couple will seat next to each other? 3. The life span in hours of an electrical component is a random variable with cumulative distribution function
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