00:01
So this question asks us, somebody that hunts goblins, he goes out 350 times throughout the year to hunt goblins, and only 27 % of the time he finds goblins.
00:10
Sorry, let me up.
00:10
It's that percentage sign.
00:11
So 27 % of time he finds goblins.
00:13
And so our first question, our first part of this question is going to ask us, if he goes out 350 times, what is the respective value that he's going to find a goblin? so all you're going to do here is take 350 and multiply it by his percentage of probability that he finds goblins.
00:28
And this is going to equal.
00:30
94 .5.
00:31
That's just a straight up calculation.
00:33
Very simple.
00:34
And so net, it asks us to find a standard deviation of the times you find goblins.
00:38
And so we can use our standard deviation formula, which is standard deviation equals the square root of mp times one minus p.
00:46
And so all you're going to do is plug in your values that we're already given.
00:49
It's only two values that we have in the problem...