For simplicity N peoples, all born in a april (month of 30days) are collected in a room, consider the event of atleast 2 people in the room being born on the same date of month even if in different years eg.1980 and 1985 what is the smallest N so that the probability of this exceeds 0.5 is ?
Ans is 7.
My approach.is If 1 person born on a different day .then its prob is 1/365
Rest of them born on a same day (1-1/365)^N
May be it is wrong.
But i want to find smallest value of N so. Should equate 2nd equation to 0.5 ?
I've seen some related problen in this site even after that i dont understand this problem.
I got incorrect ans..by using that concept