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P(X = x) = k(x + 1)3^(-x) for x = 0, 1, 2, ...: find P(X >= 2) or P(X >= 3)

The same question, asked 2 times: 8 Apr 2023*, 3 Apr 2025. Every wording below, oldest first.

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  1. Question 1

    8 Apr 2023

    158
    If the probability that the random variable XX takes values xx is given by P(X=x)=k(x+1)3−x,x=0P(X = x) = k(x + 1)3^{- x},x = 0, 1,2,3…1,2,3\ldots, where kk is a constant, then P(X≥2)P(X \geq 2) is equal to

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  2. Question 2

    3 Apr 2025

    138
    If the probability that the random variable XX takes the value x is given by P(X=x)=k(x+1)3−xP(X = x) = k(x + 1)3^{- x}, x=0,1,2,3……x = 0,1,2,3\ldots\ldots, where k is a constant, then P(X≥3)P(X \geq 3) is equal to

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