Let the probability distribution of random variable X be X|... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

Let the probability distribution of random variable X be

X	-2	-1	1	2	3
P(X=x)	k	2k	2k	k	3k

Then, the value of E(X2) is

A

$\frac{19}{9}$

B

$\frac{13}{3}$

C

$\frac{35}{9}$

D

$\frac{11}{3}$

E

$\frac{7}{3}$

Answer

$\frac{13}{3}$

Explanation

Solution

The correct option is (B): $\frac{13}{3}$