00:01
So today i'm going to answer your question about an application of the binomial distribution, a specific consideration of the wi -fi.
00:08
For doing so, first i sketch the formula that you need to use here.
00:12
In this case, n is the number of trials, x is the specific amount of success, and p is the probability of a single success.
00:19
So they ask you what is the probability that least one consumer have this behavior, that would be exactly a complement, so one minus the probability that no one have this behavior.
00:28
So i just take this formula and apply it.
00:33
So i replace the values that i have here for the case of 0.
00:37
So it would be 4 factorial over 4 factorial times 0 factorial.
00:41
0 factorial is 1.
00:42
And because these numbers are the same, so this whole expression go to 1, as you may recall from your algebra class, every name, every number raised to 0 is 1...