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Q. |
A petrol pump has two pumps; Vehicles arrive at the petrol pump according to poison input process at average of 12 per hour. The service time follows exponential distribution with a mean of 4 minutes. The pumps are expected to be idle for _____. |
A. | 33% |
B. | 43% |
C. | 53% |
D. | 65% |
Answer» B. 43% |
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