Question

Find the probability that 5 Sundays occur in the month of November of a randomly selected year.

Answer 1

Total no. of days in November = 30

So, it has 4 weeks and 2 days. 4 weeks have 4 Sundays.

The two remaining days should be

1. Sunday, Monday
2. Monday, Tuesday
3. Tuesday, Wednesday
4. Wednesday, Thursday
5. Thursday, Friday
6. Friday, Saturday
7. Saturday, Sunday

If in the above list Sunday come two times and total no. of days in a week is 7.

So, the probability of getting 5 Sundays in the month of November = `2/7`.