00:02
Hi, probability of giving birth to a baby boy is equal to 0 .52.
00:07
So, probability of giving birth to a baby girl will be equal to 1 minus 0 .52, which is equal to 0 .48.
00:18
Now, a family consists of 5 kids.
00:22
So, let x be a random variable denoting number of girls.
00:27
So, first we have to find.
00:30
The probability of exactly three girls.
00:33
That is probability exactly three girls.
00:35
So now this is an example of binomial distribution.
00:39
So here we see that this becomes n, c .r, p to the power r, q to the power, n minus r.
00:47
So over here, n is 5.
00:50
C .r over here is 3.
00:53
P over here is this probability of girl because we have taken x to be the random variable denoting number of girls.
01:01
And this becomes my q which is 0 .52...