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20 May 2021, 07:56
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catty2004
Solution:
Question Stem Analysis:
We need to determine whether a/b < c/d given that a, b, c and d are positive. Since all quantities are positive, we can cross-multiply, obtaining ad < bc. In other words, we can rewrite the question as: Is ad < bc ?
Statement One Alone:
This is not sufficient. For example, if a = b = 1, c = 3 and d = 2, then ad = 2 and bc = 3, and the answer to the question is yes.. However, if a = 3, b = 2, and c = d = 1, we see that ad = 3 and bc = 2, and the answer to the question is no..
Statement Two Alone:
The square of a quantity is less than itself if the quantity has a value between 0 and 1. Therefore, ad/bc < 1. Since bc is positive, multiplying both sides by bc, we have ad < bc. Statement two alone is sufficient.
Answer: B
16 Jun 2022, 09:26
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avigutman
just because there are so many options in St1, how can that be a reason to just reject it. Those all could very well satisfy question stem
just because there are so many options in St1, how can that be a reason to just reject it. Those all could very well satisfy question stem
avigutman
avigutman
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17 Jun 2022, 07:02
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Elite097
The question stem doesn't need to be "satisfied.", Elite097.
We have a YES/NO question, so we can determine that a statement is insufficient if it allows for both a YES and a NO.
In this case, if you look at the bottom of the video @2:35-3:10, you'll see options that lead to a YES and options that lead to a NO.
