In a non-leap year, the probability of getting 53 Sundays or 53 Tuesdays or 53 Thursdays is

In a non-leap year,  there are 365 days =52 weeks and one day

one  day can be any one of the 7 days of the week

n(S)=7

E= Event of getting 53 Sundays or 53 Tuesdays or 53 Thursdays i

n(E)={sunday ,tuesday,Thursday}=3

P(E)=3/7