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

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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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