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please help this probability and statistics questions with steps, thanksss (10 marks) Based on the data collected from previous years, the mean arrival rate at

please help this probability and statistics questions with steps, thanksss

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(10 marks) Based on the data collected from previous years, the mean arrival rate at Daki bank is three customers per minute- a. What is the probability of exactly three arrivals in a one-minute period? Explain. b. What is the probability of at least three arrivals in a ve-minute period? Explain

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