MCQ 1012 Marks
Which of the following distribution of probabilities of a random variable X is the probability distribution?
- ✓
X 0 1 2 3 P(X) 0.3 0.2 0.4 0.1 - B
X 0 1 2 P(X) 0.1 0.7 0.4 - C
X 1 2 3 4 P(X) 0.5 0.5 0.2 0.3 - D
X 2 3 4 5 P(X) 0.2 0.2 0.2 0.3
Answer
View full question & answer→Correct option: A.
| X | 0 | 1 | 2 | 3 |
| P(X) | 0.3 | 0.2 | 0.4 | 0.1 |
(A)
The sum of all the probabilities in a probability distribution is always unity.
In option (A), we have 0.3 + 0.2 + 0.4 + 0.1 = 1
The sum of all the probabilities in a probability distribution is always unity.
In option (A), we have 0.3 + 0.2 + 0.4 + 0.1 = 1