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SergejK
­A fish hatchery has been raising large populations of endangered fish species and releasing them into a local lake. At the end of each year, the hatchery takes a sample of fish from the lake and compares the number of hatchery-raised fish found in the sample with the number of wild fish found in the sample. The table provides release and sample data for five years of the hatchery’s operation.

YearNumber
released
(thousands)
Sample
size
Number
wild
Number
hatchery
Percent
hatchery
contribution
3150100554545
25301501252517
4450115902522
15801501302013
56001251101512

For each of the following statements, select Yes if that statement accurately reflects the information provided. Otherwise, select No.

­
Official Mock No 5.

­
­
Use sorting for quick solutions

The year with the smallest sample size also had the greatest number of hatchery-raised fish in the sample.

Sort by sample size. Sample size of 100 in year 3 is the smallest. It has 45 fish of hatchery in the sample. This is the greatest of all the years.

Select Yes

The year in which the hatchery released the greatest number of fish was the year when the hatchery took the largest sample of fish.


Sort by 'Number released'
Greatest is 600 in year 5. Sample size here is 125. But years 1 and 2 had sample size of 150

Select No

The year with the smallest number of hatchery-raised fish in the sample was the year in which the hatchery released the smallest percentage of the total five-year fish release.


Sort by 'Number hatchery'. 15 in year 5 is the smallest.
In year 5, hatchery released 600 fish. In all other years, it released fewer fish. Hence in year 5 the hatchery released the greatest percentage of the total five-year fish release. This means that if we were to calculate the total number of fish released in five years and the calculate the percentage of those that were released in year 1, then in year 2, then in year 3 etc., the greatest percentage would belong to year 5 because maximum fish were released in year 5.

Select No

Check out another interesting Tables question here: https://youtu.be/Ucf5Q-IJbQ8
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Deepa444
can anyone explain the 3rd one? chetan2u Bunuel MartyMurray KarishmaB
There is a trap in statement 3. They are saying the year with the smallest number of hatchery in the sample - which is year 5 - was also the year with the number released (referring to the first column) is the smallest percentage out of the total 5-year fish release.

So the trap is that you fall for the last column because it is called percent.

But they are actually saying total number released (Thousands) for year 5 - which is 600 out of the total number released is the smallest %. We don't even need to calculate it because we can see that actually year 5 eas the largest number released so it is not true.
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