engineering recuitment BHEL Engineer Trainee Mock Test 2025 Engineering Mathematics Probability and Statistics Random Variables Basics
A discrete random variable X has the probability functions as:
|
X |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
f(x) |
K |
2k |
3k |
5k |
5k |
4k |
3k |
2k |
k |
The value of E(X) is:
1
97/26
2
107/26
3
93/26
4
103/26