Exact model
A chosen month has 31 days
- Probability:
- 58.3%
- Odds:
- 1.4 to 1
- dBan
- +1.5 dBan
Seven of the twelve months have 31 days. Four have 30 days, and February has 28 or 29.
Calculation
p = 7 months / 12 months = 7/12
Assumptions
Each of the twelve named months is equally likely to be chosen. Leap years do not change which months have 31 days.
Sources
- Uniform calendar-month model