00:01
So this is another wonderful example where we're just redoing a problem and it's just stated a little bit differently.
00:06
So at most two failures is exactly the same as saying at least three successes.
00:12
So keeping that in mind, we can kind of do the same work that we did before where we're saying five choose three successes.
00:19
Or we can say five choosing two failures.
00:23
We'll have 0 .7 cubed, 0 .3 squared.
00:28
We'll be doing five choose four successes or five choose one failures.
00:35
We'll have 0 .7 to the fourth, 0 .3 to the one power, and then we'll be adding 5 choose 5 times 0 .7 to the 5, time 0 .3 to the 0 .3 to the 0.
00:56
So just going through some of the simplification again, this is going to be equal to 10...