00:01
Okay, in this problem we have a binomial problem.
00:04
45 % of all books are paperback.
00:06
So i'm going to say that my probability is 0 .45.
00:09
That's the probability that we have a paperback book.
00:12
And we're saying that our n is equal to 5 because we're picking 5 books.
00:17
Okay, so and then what we're going to do here is we're going to look for an online probability calculator that's going to give us our each of these parameters.
00:27
So the first thing i'm going to do is i'm going to set my x equal to 0.
00:31
And then i'm going to set my probability that big x is equal to little x.
00:35
So i've gone online and i've searched for a binomial probability calculator.
00:39
And i'm going to put in all of these parameters where my p is 45 .45, my n is 5.
00:44
And then i want to make sure that i'm looking at where probability of big x is equal to little x.
00:49
And then i'm going to one at a time put in each of these, right, where x equals 0, x equals 1, x equals 2, and so on.
00:56
Right, okay, so i'm going to have that right now.
00:58
I have n equals 5.
01:00
Probability is 0 .45.
01:02
My x is going to equal 0.
01:04
So for that first one is for x equals 0 is 0 .05033.
01:09
0 .05, does it want me to round to a specific number? to three decimal places.
01:14
Excellent.
01:14
So that makes it convenient...