The lesson starts with describing about probabilities and discrete and uniform random variables, no discussion is drawn about what is a random variable.
Kindly explain what is actually a random variable, what is the significance once done then only probability should come into picture.
Random Variable Description
Hey @abhishekcpsethi, I understand your concern . I am attaching some resources for you to understand random variables. I hope these help you understand the basic concepts 
Kindly go through these blogs and do tell me if you are not able to understand anything ! 
I hope this clears your doubt !
Happy Learning
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