UPSC NDA Math Model Paper 7

To find: Probability that a leap year selected at random will contain 53 Mondays
As we know, In a leap year there will be fifty-two weeks and two days.
These 2 days can be:
(Sun, Mon), (Mon, Tue), (Tue, Wed), (Wed, Thu), (Thu, Fri), (Fri, Sat) and (Sat, Sun)
Total outcomes = 7
Favourable outcomes = (Sun, Mon), (Mon, Tue) = 2
Hence the probability of getting 53 Mondays in a leap year = 2/7