00:01
Hey there, welcome to numerate.
00:03
So we're giving a binionary problem here, where we have 35 % of adults who do not work over summer.
00:09
We have a sample size of 8 adults, and for part a, we're just basically looking for p.
00:14
What is p? p is basically our proportion of adults who do not work over summer, which is 0 .35.
00:25
35 % is equivalent to 0 .35.
00:29
Now for part b, we're going to use our binulmonary.
00:31
Equation and plug in 4 for x and basically what we have here is a sample size of 8 people so that is n so plug in 4 for x this notation is combination sample size 8 x is 4 a probability is 0 .35 raised 2d this is raised to the let's see here x so x is basically 4 we plug in our 1 minus 0 .35 is 0 .65.
01:16
Raise to n minus x, 8 minus 4, it's just basically 4.
01:24
All right, so we're gonna simplify this and see what we get for our probability.
01:32
And we're gonna round to four decimal places.
01:35
Now the probability that we get is 0 .1875.
01:45
All right, and now for part c.
01:49
Part c, we're looking for something different...