Every student who walks to school goes home for lunch. It follows that some students who have part-time jobs do not walk to school.
The conclusion of the argument follows logically if which one of the following is assumed?
(A) Some students
who do not have part-time jobs go home for lunch. - WRONG. We are not sure of those students who don't have part-time jobs. Hence any option that 'not' aspect of any of the three elements would most likely be not true.
(B)
Every student who goes home for lunch has a part-time job. - WRONG. This looked somewhat good but the word 'every' ruins it.
(C) Some students
who do not have part-time jobs do not go home for lunch. - WRONG. Like A, this is not necessarily true. Most importantly we can't say anything about this one.
(D) Some students who do not go home for lunch have part-time jobs. - CORRECT.
(E) Every student who goes home for lunch walks to school. - WRONG. Reverse is not necessarily true.
Some passage that are small and abstract in nature are difficult. This one too fits in.
The three elements that define this passage are
- Walking to school
- Going home for lunch
- Part-time jobs
So, basically if one finds out how the three are related then he/she can answer the question with much ease depending on the question difficulty.
D is right here because if negated(Some students who do not go home for lunch do not have part-time jobs) it destroys the passage. Try to fit in the negated part and you would realise that it is not fitting in any way.
Answer D.