In a leap year,what is the mean number of days in in a month
There are 366 days in a leap year and there are 12 months.
To find a mean, find the total number (366) and divide by the number of numbers (12):
366 ÷ 12 = 30.5 <--- mean number of days in a month in a leap year
366 / 12 = 30.5