Pipes & Cistern Quiz For Upcoming Exams

Q1. A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty the two pipes were opened. After some time, the first pipe was stopped and...
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Statistics Notes For SSC CGL / CHSL Exam 2019-20 on :...

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Variable: A variable is an entity that varies from a place to place, a person to person, a trial to trial and so on....

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