HSC Arts 12th Board ExamMaharashtra State Board
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# The Probability Mass Function (P.M.F.) of X is Given Below - HSC Arts 12th Board Exam - Mathematics and Statistics

ConceptProbability Distribution Probability Mass Function (P.M.F.)

#### Question

The probability mass function (p.m.f.) of X is given below:

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

find E(X2)

#### Solution

 x P(x) xP(x) x2P(x) 1 1/5 1/5 1/5 2 2/5 4/5 8/5 3 2/5 6/5 18/5 sumx^2P(x)=27/5

E(x^2)=sum x^2P(x)=27/5

Is there an error in this question or solution?

#### APPEARS IN

2013-2014 (March) (with solutions)
Question 4.2.4 | 2.00 marks

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Solution The Probability Mass Function (P.M.F.) of X is Given Below Concept: Probability Distribution - Probability Mass Function (P.M.F.).
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