00:01
Once again, welcome to new problem.
00:04
This time we're dealing with averages.
00:06
We're dealing with averages.
00:09
So if you have, say, 12 months and within each month, you have an amount, so x1, x2, x3, all the way up until x12.
00:32
So this is represented by 12 months.
00:37
Then the average for these 12 months, x bar, is the summation of all these amounts and then divided by 12.
00:55
So you're summing up all these amounts and dividing by 12.
00:59
We're looking at a new problem involving two different cities.
01:04
So you have the first cd and then you also have the second cd.
01:13
So this is the second one and this is the first one.
01:16
So assume the second cd has rainfall x millimeters and then the first cd has 111.
01:29
And then the first cd has 118 mm...