Others Maths Puzzle

What is the probability of getting five Monday in a 31-days month ?

Read Solution (Total 2)

Any 31 day month whose 1st day is a Saturday, Sunday or Monday has 5 Mondays.
3/7 of 31 day months begin with those 3 days.
3/7 is the probability that a 31 day month will have 5 Mondays.
10 years agoHelpfull: Yes(3) No(0)

ans =3/7
31 days month have 4 week and three days
and combinations are(3)= sun mon tues ,mon tus wed ,sat sun mon in 7 days so
probability=37
10 years agoHelpfull: Yes(2) No(0)

Others Other Question

I have two coins.
* One of the coin is a faulty coin having tail on both side of it.
* The other coin is a perfect coin (heads on side and tail on other).
I blind fold myself and pick a coin and put the coin on table. The face of coin towards the sky is tail.

What is the probability that other side is also tail ?
7,35,...2373,16772