The mayor boasts that the average ambulance turnaround time, the time from summons to delivery of the patient, has been reduced this year for top-priority emergencies. This is a serious misrepresentation. This “reduction” was produced simply by redefining “top priority.” Such emergencies used to include gunshot wounds and electrocutions, the most time-consuming cases. Now they are limited strictly to heart attacks and strokes. Which one of the following would strengthen the author’s conclusion that it was the redefinition of “top priority” that produced the reduction in turnaround time? (A) The number of heart attacks and strokes declined this year. (B) The mayor redefined the city’s financial priorities this year. (C) Experts disagree with the mayor’s definition of “top-priority emergency.” (D) Other cities include gunshot wound cases in their category o top-priority emergencies. (E) One half of all of last year’s top-priority emergencies were gunshot wounds and electrocution cases. Source: LSAT

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The mayor boasts that the average ambulance turnaround time, the time

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KarishmaB

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03 Jul 2025, 00:15

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agrasan

Hi experts KarishmaB MartyMurray DmitryFarber IanStewart

I understand why E is correct but still a bit confused why option A is wrong?
My reasoning is: we know that heart-attacks and strokes take less time. If number of cases for them declined this year along with gunshot wounds+electrocutions, then it strengthens the conclusion. Am I making any stretch here?

Separately, could I reject this option by the logic of Quant that decrease in number won't explain the average change? only the change in mix (gunshots, strokes, etc.) will explain that?

Yes, exactly this. If average of 10 numbers is 56, can you say what the average of 8 of those numbers is? You cannot say that it must be less than 56. It could be same or much more than 56 too. It depends on which 8 numbers you picked.

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