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  1. Px(X) = M exp(- 2 |x|) + N exp(- 3 |x|) is the probability density function for the real random variable X, over the entire x axis. M and N are both positive real numbers. The equation relating M and N is

    2. A.
    B.
    C.
    M + N = 1
    D.
    M + N = 3

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    Answer : Option A

    Explanation :

    Using property of probability density of Pxdx = 1

    [M exp(- 2 |x|) + N exp(- 3|x|)]dx

    1 ⇒ .

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