Certain instruments used in veterinary surgery can be made either of stainless steel or of nylon. In a study of such ...

RachP on May 30, 2022

How is C incorrect? The stimulus says that each type in the study was 50

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Ross-Rinehart on June 1, 2022

We’re told there were 50 sterilzations of a “*set* of nylon instruments” and 50 sterilzations of a “*set* of stainless steel instruments.” But we have no idea how many instruments are in a “set” of either. There could 10 nylon instruments in a set and only 5 stainless steel instruments in a set. In that case, (C) could be true.

I know, this is an annoying, picayune detail the question expects you to notice. But, there’s a lesson about careful reading here!