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Solution - Probability Distribution - Expected Value, Variance and Standard Deviation of a Discrete Random Variable

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Question

Find the expected value, variance and standard deviation of random variable X whose probability mass function (p.m.f.) is given below: 

X=x123

P(X=x)

1/52/52/5

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Solution for concept: Probability Distribution - Expected Value, Variance and Standard Deviation of a Discrete Random Variable. For the courses 12th HSC Arts, 12th HSC Science (Computer Science), 12th HSC Science (Electronics), 12th HSC Science (General)
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