7 a ] A random variable ๐ has the following probability function:
| x | โ2 | -1 | 0 | 1 | 2 | 3 |
| P(x) | 0.1 | k | 0.2 | 2k | 0.3 | k |
Find the value of k and calculate the mean and variance
A random variable ๐ has the following probability function Find the value of k and calculate the mean and variance