00:01
Hello students, today we will discuss about this question.
00:03
In this question we are given that let x equals the number of people selected x that is the number of people selected at random that you must ask in order to find the someone with same birthday as yours.
00:22
So here x that is a number of people now assume that each day of the year is equally likely and ignore the february 29.
00:35
Then we need to find in the part a what is the pmf of x.
00:41
So therefore here we need to find pmf of x that is equals to question mark.
00:46
And in the part b, we need to find give the values of the mean.
00:51
So here mean that is equals to question mark.
00:54
Variance is equals to question mark and the standard deviation of x that is equals to question mark.
01:02
So here first of all, the probability of the person with the same birthday, so that is probability of person of same birthday, that is 1 divided by 365.
01:19
So that is p is equals to 1 divided by 365...