PHC-Minchi
Elite
Thank youuu boss

| number of days(X) | probabilities(P(x)) | x.P(x) | x^2.P(x) |
| 1 | 24.9% | 0.249 | 0.249 |
| 2 | 10.8% | 0.216 | 0.432 |
| 3 | 9.1% | 0.273 | 0.819 |
| 4 | 12.3% | 0.492 | 1.968 |
| 5 | 13.3% | 0.665 | 3.325 |
| 6 | 11.4% | 0.684 | 4.104 |
| 7 | 7.0% | 0.49 | 3.43 |
| 8 | 3.8% | 0.304 | 2.432 |
| 9 | 1.9% | 0.171 | 1.539 |
| 10 | 1.3% | 0.13 | 1.3 |
| 11 | 1.0% | 0.11 | 1.21 |
| 12 | 0.8% | 0.096 | 1.152 |
| 13 | 0.6% | 0.078 | 1.014 |
| 14 | 0.4% | 0.056 | 0.784 |
| 15 | 0.2% | 0.03 | 0.45 |
| 16 | 0.2% | 0.032 | 0.512 |
| 17 | 0.1% | 0.017 | 0.289 |
| 18 | 0.1% | 0.018 | 0.324 |
| total | 4.111 | 25.333 |
