0:00
Hello.
00:03
If you look at this table, we can find the amount of the ratio of expected usage by costs.
00:15
And looking at this amount, we can find that the best, the most effective recreation facility is athletic field and the less effective the last useful facility is gymnasium.
00:38
And swimming pool and tennis center are somewhere in the middle and we can afford three of them.
00:46
So the best choice is athletic field.
00:52
We will, i think we should choose this one.
00:59
Also, we choose tennis center.
01:04
It also has a high enough ratio of usage over cost.
01:18
Also we can construct swimming pool.
01:24
It has less expected usage by cost but it's still good.
01:31
And we should not construct a gymnasium because if we divide expected usage 150 and it's over cost it will be the lowest value.
01:46
So we will not construct this one.
01:49
And now let's look to the answer options.
01:52
We need to find which one is not correct.
01:55
So tennis center will not be chosen.
02:01
Well actually it will be chosen.
02:03
So it seems like a is not correct answer.
02:07
And we should choose a.
02:10
But let's check all other options...