If the difference between the expectation of the square of a random variable…

GATE · 2011 · CS · Computer Science & IT

If the difference between the expectation of the square of a random variable (E[X2])\left(E\left[X^2\right]\right) and the square of the expectation of the random variable (E[X])2\left(E\left[X\right]\right)^2 is denoted by RR, then

  1. A.

    R=0R = 0

  2. B.

    R<0R < 0

  3. C.

    R≥0R \geq 0

  4. D.

    R>0R > 0

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