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 :
Answer & explanation
Correct answer: option 3
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