00:01
What is the probability of a couple giving birth to five girls in a row? so, of course, the chance for any particular child is 50%.
00:10
So the chance of having a girl is 50%.
00:14
What about five times in a row? so for this to happen, the first child would have to be a girl, the second child would have to be a girl, and the third, the fourth, and the fifth.
00:30
So in probability, when you want two events to happen, so something and something else, you multiply the chance of them happen.
00:40
So the chance of the first child and the second child being a girl is 50 % for the first and 50 % for the second, so you multiply that to get 25%, 1 in 4.
00:52
And we're going to do the same thing because we want all of them to be.
00:55
So first child and second and third and fourth and this.
01:01
Is 50 % to the power of 5, or 1 over 2 to the power of 5.
01:11
So 2 to the power of 5 is 32, so this is 1 in 32.
01:17
So that's the chance of having a girl 5 times in a row...