defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Probability Mean and Variance of Random variables
A random variable X has the distribution law as given below:
|
X |
1 |
2 |
3 |
|
P(X = x) |
0.3 |
0.4 |
0.3 |
The variance of the distribution is:
1
0.4
2
0.6
3
0.2
4
None of these