The Brainliest Answer!
The total no of days in January is 31
so its sure that it have 4 Sundays
Now the remaining days are 3 
so the remaining days should be
1.Sunday, Monday, Tuesday
2.Monday, Tuesday, Wednesday
3.Tuesday, Wednesday, Thursday
4.Wednesday, Thursday, Friday
5.Thursday, Friday, Saturday
6.Friday, Saturday, Sunday
7.Saturday, Sunday, Monday
In this Sunday came three times
and the total no of days in a week is 7
So the probability of getting 3 Sundays in the month of January is 3/7 

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