Three people are invited to participate a seminar. Assume all three people arrives independently, and the probability of any one of them is late is 0.2. Let X be the number of late participants of the seminar. 1 . Find the distribution (pmf) of X. 2 . Calculate mean and variance of ✗.

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A: References Rahman, M. S. (2017). Basic graph theory (Vol. 9). India: Springer.