00:01
We know that 35 % of a population is left -handed.
00:05
We pick eight people at random.
00:07
So n is 8.
00:09
P, probability of each person being left -handed, is 0 .35.
00:15
Since these are randomly selected, each person is an independent tribe.
00:21
Whether or not one person is left -handed does not influence the probabilities of the other people being left -handed or not.
00:29
This means that if i want to combine trials, so the probability of x and y, is equal to probability of x times probability of y.
00:41
So i want the probability that at least one of them is left -handed.
00:49
Well, when i look at these eight people, there are only nine possible outcomes.
00:53
Either none of them are left -handed, or one, or two, or three, up to eight.
00:57
One of those nine outcomes will definitely happen...