Total numbers of elementary events are: 7

Let E be the event of having exactly 52 Mondays

Note- a leap year has 366 days or 52 weeks and 2 day. Two days could be any days amongst Sunday, Monday, Tuesday, Wednesday, Thursday, Friday or Saturday.

Favorable outcomes are: Tuesday, Wednesday, Thursday, Friday, Saturday,

Number of favorable outcome is = 5

P (52 Mondays) = P (E) = 5/7