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Answer the following questions and use Excel to show your work. Customers arrive at a supermarket check-out...

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Basic Math

Answer the followingquestions and use Excel to show your work.

Customers arrive at a supermarket check-out counter with anaverage arrival rate of 9 customers per hour. Answer questions 8–10using the preceding information and modeling this situation as aPoisson distribution.

8. What is the probability of less than 5 customers arriving atthe supermarket check-out counter in a given 1-hour period? a)0.054 b) 0.446 c) 0.359 d) 0.612

9. What is the probability of exactly 12 customers arriving atthe supermarket check-out counter in a given 1-hour period? a)0.262 b) 0.044 c) 0.073 d) 0.189

10. What is the probability of no less than 12 customersarriving at the supermarket check-out counter in a given 1-hourperiod? a) 0.115 b) 0.197 c) 0.381 d) 0.686

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