Lesson: Avoiding Common Mistakes - Part II

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At 3:25 in the example for no. of boys, can the total no. of students not be 0?
In that case, no. of boys would be 0 and hence the combined statement also becomes insufficient.
gmat-admin's picture

Great question.
In this instance, the number of students can be assumed to be greater than 1, since the sentence states that there is a class of "students" (plural)

is it generally safe to assume that in real-world examples (i.e, your classroom example) both integers and positive numbers are implied?
gmat-admin's picture

In MANY real-world questions, the numbers are typically positive integers. That said, it isn't ALWAYS the case. For example if we're talking about the time it takes for a pump to fill a pool, we can have non-integer values for the time it takes, the rate at which the pump pumps water and the volume of water in the pool.

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