GMAT Quantitative Reasoning Practice Test 2

Question : 57 of 100

Marks: +1, -0

In the third grade of Windblown School there are 108 students, one third of them failed the math test and

1 / 6

failed that literature test. At least how many students failed both tests?

Solution:

1 / 3 × 108=36

failed the math test.

1 / 6 × 108=18

failed that literature test.
The least amount of people that failed both tests is

18+36-108=-54

,
there can't be an negative overlapping between the groups so the least amount of people who failed both tests is zero.

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