hi

here you have to choose 25 days

there are 12 months in a year

if we assume to take equal number of days from every month

then it gives 2 days from each month

and now 1 day is left to choose( b'cose 12*2=24 days we already chosen)

we have to choose that one day out from one of the 12 month

which ever be the month, there will be atleast one month from which 3 days will be chosen