# Question: Compute the expected number of cars arriving in Problem 13 15

Compute the expected number of cars arriving in Problem 13-15 using the expected value formula. Compare this with the results obtained in the simulation.

In Problem 13-15 The number of cars arriving per hour at Lundbergâ€™s Car Wash during the past 200 hours of operation is observed to be the following:

Number of Cars Arriving Frequency

3 or fewer ............. 0

4 .................. 20

5 .................. 30

6 .................. 50

7 .................. 60

8 .................. 40

9 or more .............. 0

Total ............... 200

In Problem 13-15 The number of cars arriving per hour at Lundbergâ€™s Car Wash during the past 200 hours of operation is observed to be the following:

Number of Cars Arriving Frequency

3 or fewer ............. 0

4 .................. 20

5 .................. 30

6 .................. 50

7 .................. 60

8 .................. 40

9 or more .............. 0

Total ............... 200

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