Bunuel wrote:
Is m between 35 and 75 ?
(1) m is between 40 and 80.
(2) m is between 50 and 90.
Target question: Is m between 35 and 75 ? Statement 1: m is between 40 and 80 This statement doesn't
FEEL sufficient, so I'm going to TEST some values.
There are several values of m that satisfy statement 1. Here are two:
Case a: m = 55, in which case
m IS between 35 and 75Case b: m = 76, in which case
m is NOT between 35 and 75Since we cannot answer the
target question with certainty, statement 1 is NOT SUFFICIENT
Aside: For more on this idea of plugging in values when a statement doesn't feel sufficient, you can read my article: http://www.gmatprepnow.com/articles/dat ... lug-values Statement 2: m is between 50 and 90.Let's TEST some values.
There are several values of m that satisfy statement 2. Here are two:
Case a: m = 55, in which case
m IS between 35 and 75Case b: m = 76, in which case
m is NOT between 35 and 75Since we cannot answer the
target question with certainty, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined There are still several values of m that satisfy BOTH statements Here are two:
Case a: m = 55, in which case
m IS between 35 and 75Case b: m = 76, in which case
m is NOT between 35 and 75Since we cannot answer the
target question with certainty, the combined statements are NOT SUFFICIENT
Answer: E
Cheers,
Brent
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