00:01
The probability of more than one success, we'll find the opposite of no successes or just one success.
00:08
So that is going to be no successes 8 choose 0, p 0 .22 to the 0 and then 1 minus p 0 .88.
00:17
All of them will be fails to the 8 power and then one success is 8 choose 1, 0 .22 to the 1, 0 .88 to the 7.
00:26
8 choose 0 is 1.
00:30
So we really just have 0 .88 to the 8th power there, 0 .35.
00:37
Actually that's going to round up 6, 0, 0.
00:42
No, sorry, 0 .3596.
00:49
And then 8 choose 1 is going to be 8 times 0 .22 times 0 .88 to the 7th power.
00:56
We get 0 .7192.
01:13
So let me check back on the other one again, 0 .88 to the 8th power.
01:21
Okay, sorry, somehow this is adding up over 1.
01:23
Somehow i just typed in my calculator wrong...