00:01
Okay, i want to work out the chance that the jewell is all male.
00:04
And first of all, i'll work out the sample space.
00:07
So there's a random choice of people then.
00:12
27, so your sample space is the number of possible jewellies you can have.
00:20
So it's 27 choose 12.
00:23
Totally random choice.
00:25
I don't care, male or female.
00:27
Pick 12 from 27.
00:29
And this i can work out on a calculator on the ti -84.
00:33
Plus, what you do is you press the math key on the left, go across to prob, the arrow key, go down to item 3, ncr, and then just type in 27, or enter first.
00:50
Then 27, c12 is a large number, 1738, 3860.
01:04
So about 17 .4 million possible jewelry...