00:01
Okay, we have here then six questions.
00:04
Each one has four answers given, only one's correct.
00:08
So if you guess completely, p of being correct per question is one chance out of four, which means, of course, p of being wrong each time is three chances out of four.
00:25
Now, part a, what i want is the first one correct, second one correct.
00:32
Correct, third wrong, fourth wrong, fifth and sixth also wrong, in that order.
00:40
So correct, correct, and then four wrong.
00:45
So that's one quarter for the first one, one quarter, second one, and then three quarters, four times, so we do power four, and that would be the answer.
00:59
So let's work it out.
01:00
Three quarters is 0 .75 power 4 and times a quarter times a quarter means divide by 16.
01:11
So the answer is 0 .19775.
01:18
And what they want here, okay, no mention of accuracy...