1.

What is the chance that a leap year selected at random contains 52 sundays?

Answer»

In a leap YEAR there are 52 weeks, and two remaining DAYS.

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

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



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