Q. 35.0( 2 Votes )

A random variable A. 0.1

B. 0.2

C. 0.3

D. 0.4

Answer :

Let the value P(X=0) be x and the value of P(X=1) be A


GIVEN- P(X=3) =2P(X=1)


=2(A) =2A


P(X=2) =0.3


So, The Probability distribution of X is



Mean of E(X) =1.3



(0×x)+(1×A)+(2×0.3)+(3×2A)=1.3


A+0.6+6A=1.3


7A+0.6=1.3


7A=0.7



A=0.1


By putting the value of A in probability distribution, we get



We Know that



Therefore,


x+0.1+0.3+0.2=1


x=1-0.6


x=0.4

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