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

Gujarat BoardEnglish MediumSTD 12 CommerceStatisticsRANDOM VARIABLE ANE DISCRETE PROBABILITY DISTRIBUTION2 Marks
Question
The random variable $X$ assume the values $-2,-1,0$ and 1 with respective probability $k, 2 k, 3 k$ and $4 k$, find the value of $k$ and $P[X=0]$.
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Answer

$K=0.1, P[X=0]=0.3$

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