railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Mathematics Probability Continuous Distributions
A random variable x has density function \(f(x) = \left\lbrace \begin{matrix} kx^2, \ \ -3 \le x \le 3 \\\ 0, \ \ \text{else where} \end{matrix} \right.\) then k will be equal to
1
0
2
\(\frac{1}{18}\)
3
\(\frac{1}{6}\)
4
\(\frac{1}{9}\)