Answer :

X can take values as 2,3,4,5 such that P(X – 2) = probability that the larger of two number is 2

P(X = 2) =


Similarly,


P(X = 3) =


P(X = 4) =


P(X = 5) =



E(X) = 2


E(X2
) = 4


Therefore, Variance, V(X) = E(X) – E(X2)


= 17 – 16


= 1.

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