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  4. The probability distribution of x is X 0 1 2 3 p (x) 0.2 k k 2 k Find the value of k

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Q. The probability distribution of $x$ is
X 0 1 2 3
p (x) 0.2 k k 2 k

Find the value of k

KCETKCET 2015Probability - Part 2

Solution:

We know that,
$ \Sigma P(X) =1 $
$\Rightarrow 0.2+k+k+2 k =1 $
$\Rightarrow 4 k =0.8$
$\therefore k=0.2$