5.1 & 5.3: Discrete Uniform Distribution | Exercise Solution of Probability & Statistics by Walpole

This is the exercise problem solution of a Chapter number 5, "Some Discrete Probability Distributions " from 9th edition of "Probability and Statistics for Engineers and Scientists by Walpole". In this video, I solved exercise problems 5.1 and 5.3 to discuss the fundamental probability concepts of discrete uniform distributions and explained the conceptual over of a discrete uniform random variable.
5.1: A random variable X that assumes the values x1, x2,...,xk is called a discrete uniform random variable if its probability mass function is f(x) = 1
k for all of x1, x2,...,xk and 0 otherwise. Find the mean and variance of X.
5.3: An employee is selected from a staff of 10 to supervise a certain project by selecting a tag at random from a box containing 10 tags numbered from 1 to 10. Find the formula for the probability distribution of X representing the number on the tag that is drawn. What is the probability that the number drawn is less than 4?
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