Assume that the number of sick kids in a family is a discrete random variable X with probability function P(X = x).
| x |
0 |
1 |
2 |
3 |
4 |
5 |
| P(X = x) |
0.3 |
0.2 |
0.2 |
0.1 |
0.1 |
0.1 |
1. Is this distribution symmetric?
2. Compute the probability that exactly only 2 kids are sick
3. Compute the probability that at least 2 kids are sick.