The probability distribution of X is:
| x | 0 | 1 | 2 | 3 | 4 |
| P(X = x) | 0.1 | 2k | k | k | 2k |
Then var(X) =
1
\(\frac{3}{20}\)
2
\(\frac{9}{4}\)
3
\(\frac{141}{20}\)
4
\(\frac{159}{80}\)
The probability distribution of X is:
| x | 0 | 1 | 2 | 3 | 4 |
| P(X = x) | 0.1 | 2k | k | k | 2k |
Then var(X) =