Practicing Success

Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Probability

Question:

A random variable x has the following probability distribution.

x 1 2 3 4 5 6
P(x) $\alpha $ 0.1 0.3 $\beta $ 0.4 0.1

In the above table, $P[x-1\, or \, x=4]$ is equal to :

Options:

0.05

0.01

0.1

0.5

Correct Answer:

0.1

Explanation:

The correct answer is Option (3) → 0.1

$∑P(X)=1⇒α+β+0.9=1$

$⇒α+β=0.1$

so P(X=1 or X=4) = α + β

= 0.1