Home
Class 12
MATHS
For a random variable X, if E(X) = 5 and...

For a random variable X, if E(X) = 5 and V(X) = 6, then `E(X^2)` is equal to

A

19

B

31

C

61

D

11

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

For a random variable X, if Var (X) = 4 and E(X^(2))=13 , the value of E(X) is

The probability distribution of the random variable X is given by Then, 4E(X^2)-var(X) is equal to

If y=x+e^x , then (d^2x)/(dy^2) is equal to

If x^(y) = e^(2(x-y)), "then" (dy)/(dx) is equal to

The mean and standard deviation of random variable X are 10 and 5 respectively, then E((X-15)/5)^(2) = ________.

If the p.d.f of a random variable X is f(x)={(0.5x, 0lexle2), (0, "otherwise"):} Then the value of P(0.5 le X le 1.5) is

If the probability mass function of a discrete random variable X is P(x)=C/(x^3), x=1,2,3 =0, otherwise Then E(X)=

Let pmf of a random variable X is P(x)=(3-x)/10 ,x=-1,0,1,2.=0,otherwise.Then E(x) is…