Mean and variance of Binomial Distribution - A simple proof

For books, we may refer to these:
https://amzn.to/34YNs3W OR https://amzn.to/3x6ufcE

This lecture gives proof of the mean and Variance of Binomial distribution. Also, two examples are given to explain it.
Other distribution
Mean and Variance of Binomial Distribution:    • Mean and variance of Binomial Distrib...  
Binomial Distribution:    • Binomial Distribution  
Poisson Distribution (Part 2):    • Poisson Distribution  
Poisson Distribution (Part 1):    • Poisson Distribution Solved Examples  
Geometric Distribution:    • Geometric Distribution & Examples  
Negative Distribution:    • Negative Binomial Distribution and Ex...  
Uniform Distribution:    • Uniform Distribution  
Exponential Distribution:    • Exponential Distribution | Simplest W...  
Normal Distribution:    • Normal Distribution: How to calculate...