Teaching CSIR NET Mock Test Series Engineering Mathematics Probability and Statistics Random Variables Basics
Let x be a random variable with probability mass function
\(f\left( x \right) = \left\{ {\begin{array}{*{20}{c}} {k.|x|,}&{ifx = - 2,1,3}\\ {0,}&{otherwise} \end{array}} \right.\)
where, K is a constant. Then the variance of x is:
1
23/ 6
2
5
3
6
4
37 / 6