@utk0203 , could u please tell me that Queuing Theory is in gate syllabus or not ?

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Which of the following statements are FALSE?

- For poisson distribution, the mean is twice the variance.
- In queuing theory, if arrivals occur according to poisson distribution, then the inter-arrival time is exponentially distributed.
- The distribution of waiting time is independent of the service discipline used in selecting the waiting customers for service.
- If the time between successive arrivals is exponential, then the time between the occurences of every third arrival is also exponential.

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