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In a small clinic only one case is possible to handle at a time, patients arrive on an average of 3 per hour. The mean service time should be less than _________ minutes per patient so that the average time in the system is less than 15 minutes.
  • a)
    8
  • b)
    9
Correct answer is between ' 8, 9'. Can you explain this answer?
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The average arrival rate of patients is given as 3 per hour. This means that, on average, three patients arrive at the clinic every hour.

In order to determine the mean service time, we need to calculate the average time it takes to serve each patient.

Let's assume that the mean service time is x minutes per patient.

The average number of patients served per hour can be calculated using Little's Law, which states that the average number of customers in a stable system is equal to the average arrival rate multiplied by the average time spent in the system.

Given that the average time in the system should be less than 15 minutes, we have:

Average time in the system = 15 minutes
Average arrival rate = 3 patients per hour

Using Little's Law, we can write the equation as:

3 patients/hour = x minutes/patient * 15 minutes

Simplifying the equation, we have:

3 = 15x

Dividing both sides by 15, we get:

x = 3/15 = 1/5 = 0.2 minutes

Therefore, the mean service time should be less than 0.2 minutes per patient in order to ensure that the average time in the system is less than 15 minutes.

Converting 0.2 minutes to seconds, we have:

0.2 minutes * 60 seconds/minute = 12 seconds

Hence, the mean service time should be less than 12 seconds per patient.

Since the options given are in minutes, we can convert 12 seconds to minutes by dividing by 60:

12 seconds / 60 seconds/minute = 0.2 minutes

Thus, the mean service time should be less than 0.2 minutes, which is equivalent to 12 seconds per patient.

Therefore, the correct answer is between 8 and 9 minutes, as the mean service time should be less than 12 seconds per patient or 0.2 minutes per patient.
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In a small clinic only one case is possible to handle at a time, patients arrive on an average of 3 per hour. The mean service time should be less than _________ minutes per patient so that the average time in the system is less than 15 minutes.a) 8b) 9Correct answer is between ' 8, 9'. Can you explain this answer?
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