CUET and UG exam CUET UG 2025 Mock Test Series Mathematics Probability Mean and Variance of Random variables
Let X be a discrete random variable. The probability distribution of X is given below:
| X | 30 | 10 | –10 |
| P(X) | \(\frac{1}{5}\) | \(\frac{3}{10}\) | \(\frac{1}{2}\) |
Then E(X) is equal to
1
6
2
4
3
3
4
–5