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# Solution - Find the expected value, variance and standard deviation of random variable X whose probability mass function (p.m.f.) is given below - Probability Distribution - Expected Value, Variance and Standard Deviation of a Discrete Random Variable

ConceptProbability Distribution Expected Value, Variance and Standard Deviation of a Discrete Random Variable

#### Question

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

 X=x 1 2 3 P(X=x) 1/5 2/5 2/5

#### Solution

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#### APPEARS IN

2014-2015 (October)
Question 6.2.3 | 4 marks
Solution for question: Find the expected value, variance and standard deviation of random variable X whose probability mass function (p.m.f.) is given below concept: Probability Distribution - Expected Value, Variance and Standard Deviation of a Discrete Random Variable. For the courses HSC Arts, HSC Science (Computer Science), HSC Science (Electronics), HSC Science (General)
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