Question

Find the probability of getting 52 sundays in a leap year.
Ans. in the book=5/7
Answer it ASAP

Answer 1

In a leap year there are 52 weeks, and two remaining days.

Those two days are consecutive, so there can 7 equally likely pairs.

They are:

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

Among the 7 pairs, (Saturday, Sunday) and (Sunday, Monday) pair will result in 53 Sundays.

So unfavourable pairs are these 2, rest (7–2=5) pairs are favourable.

So the probability = 5/7.

-WonderGirl