00:01
You're taking a multiple choice test and run out of time, and so in the last six questions, you're going to guess.
00:07
Each one of these has a possibility of four choices, and the number of answers.
00:13
So one out of each one of those fours is going to be correct.
00:16
Three out of four is going to be incorrect.
00:19
We want to know the probability that you answer fewer than two questions correctly on the last two questions.
00:26
So the probability that x is less than two means we need the probability of zero, probability of one, and the probability of, no, we don't need to because we want it to be less than two.
00:40
Probability of zero and the probability of one.
00:46
Now, but the thing is we don't know which one is wrong.
00:50
So we're going to take the probability of zero.
00:53
Okay, let me make sure i'm reading this right.
00:57
Incorrectly aggressive so we get them wrong.
00:59
Okay, so we want the probability or combination of six things picking zero at a time because we don't know which one of those six is wrong.
01:09
So that's going to be.....