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Hey there, I built this website for students studying for tough tests. I think everyone should get education for free, so that's why I made this site. But now, the way Google ranks websites changed, and not many people are visiting here. I use money from Google ads to keep this site running, but with less visitors, it's hard to do that anymore. If you like this website and want it to keep going, can you help out? Any support you give would be really appreciated. Thanks a lot for considering it.


You can send your support here : Buy Me A Coffee

The reasons which are basically responsible for the formation of a queue should be that

A. The average service rate Hess than the average arrival rate

B. Output rate is linearly proportional to input

C. Output rate is constant and the input varies in a random manner

D. All of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".