What Is the Probability That December Has Exactly 5 Sundays?
Discover how to determine the probability of December having exactly 5 Sundays based on the day December 1st falls on.
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Video transcript
December has exactly 5 Sundays in years where the 1st of December falls on a Sunday. Given December has 31 days, this can only happen if December 1st lands on a Sunday, which can be quickly checked using a calendar or date algorithm.
Questions and answers
How often does December have 5 Sundays?
December has exactly 5 Sundays in years when December 1st falls on a Sunday, which happens roughly once every 7 years.
Why does the day December 1st fall on determine the number of Sundays?
Because December has 31 days, starting on a Sunday allows for five Sundays within the month; otherwise, fewer Sundays occur.
Can I quickly check if December has 5 Sundays in a specific year?
Yes, by using a calendar or a date algorithm to see what weekday December 1st falls on in that year.