1. An average of 3 cars arrived at a highway tollgate every minute. What is the probability that at most 45 cars will arrive in a quarter of an hour.
1. An average of 3 cars arrived at a highway tollgate every minute. What is the probability that at most 45 cars will arrive in a quarter of an hour.
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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1. An average of 3 cars arrived at a highway tollgate every minute. What is the
probability that at most 45 cars will arrive in a quarter of an hour.
2. Approximately 6% of the male population is color-blind. If a random sample
of 250 male adults is tested for color-blindness, what is the probability that
at least 10, but no more than 20 will be color-blind?
3. A professor of a law school observe that 25% of students who get admitted
to the freshman class reach fourth year. Assuming that this is correct, find
the probability that among 40 randomly selected students, at least 12 will
reach fourth year?
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