Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section B2

Chapter

Probability Distributions

Question:

If a discrete random variable x has the following probability distribution :

X: 1 2 3 4
P(X): $\lambda $ $\lambda^2$ $2\lambda^2$ $\lambda $

then, the value of $\lambda $ is :

Options:

$\frac{1}{3}$

$\frac{2}{3}$

$0.5$

$\frac{3}{4}$

Correct Answer:

$\frac{1}{3}$