Is rw = 0?
(1) −6 < r < 5
(2) 6 < w < 10
Answer: E
Source: Official guide
Is rw = 0?
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Target question: Is rw = 0?BTGModeratorVI wrote: ↑Sat Aug 08, 2020 7:03 amIs rw = 0?
(1) −6 < r < 5
(2) 6 < w < 10
Answer: E
Source: Official guide
Since each statement ALONE fails to provide information about both variables, let's jump straight to....
Statements 1 and 2 combined
There are several values of r and w that BOTH statements. Here are two:
Case a: r = 0 and w = 7, in which case rw = (0)(7) = 0
Case b: r = 1 and w = 7, in which case rw = (1)(7) = 7
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT
Answer: E
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Solution:BTGModeratorVI wrote: ↑Sat Aug 08, 2020 7:03 amIs rw = 0?
(1) −6 < r < 5
(2) 6 < w < 10
Answer: E
Source: Official guide
Question Stem Analysis:
We need to determine whether rw is 0.
Statement One Alone:
Since we don’t know anything about the value of w, we can’t determine whether rw is 0. Statement one alone is not sufficient.
Statement Two Alone:
Since we don’t know anything about the value of r, we can’t determine whether rw is 0. Statement two alone is not sufficient.
Statements One and Two Together:
With the two statements, we still don’t have enough information to determine whether rw is 0. For example, if r = 0 and w = 7, then rw = 0. However, if r = 1 and w = 7, then rw ≠ 0. Both statements together are still not sufficient.
Answer: E
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