It is 1. Every month contains 28 days.
First we don't consider leap year There is 1 month with 28 days: february There are 4 months with 30 days: april, june, september, november So the probability to select a month with 28 or 30 days is (1+4)/12 = 5/12 If the year is a leap year then the probability is 4/12
Absolute certainty
If you look at the link below, the probability of a 28 year old female having a baby with Down syndrome is a little less than 1 in 1000.
28/52
(25-21) / (28-20) = 4/8 =0.5 or 50%
The probability is approx 15/16.
First we don't consider leap year There is 1 month with 28 days: february There are 4 months with 30 days: april, june, september, november So the probability to select a month with 28 or 30 days is (1+4)/12 = 5/12 If the year is a leap year then the probability is 4/12
Absolute certainty
All of them have 28 days!
There is only 1 month that has JUST 28 days (February), but every month has at least 28 days. The answer is twelve.
The shortest "month" of the Gregorian calendar has 28 days.
1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.1 month of 31 days.
February has 28 days
All months have 28 days. But, February is the only month that ends on the 28th.
Every month has 28 days - Febuary just doesn't have any more than that (except on a leap year).
months vary from 28-31 days. most are 30 days long
Febuary