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RANDOM VARIABLE ANE DISCRETE PROBABILITY DISTRIBUTION — Statistics STD 12 Commerce — Question

Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsRANDOM VARIABLE ANE DISCRETE PROBABILITY DISTRIBUTION1 Mark
MCQ
For the probability distribution of a discrete random variable $E(X) = 4$ and $E(X^2) = 35,$ What will be the variance of this distribution?
  • ✓
    $9$
  • B
    $21$
  • C
    $29$
  • D
    $41$
✓

Answer

Correct option: A.
$9$

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