BANON wrote:
How many of the 42 people in a group are employed students?
(1) 29 of the 42 people are employed.
(2) 24 of the 42 people are students.
Here's a step-by-step approach using the
Double Matrix method.
Here, the criteria are:
- employment status (employed or unemployed)
- schooling (student or non-student)
There are 42 people altogether, so our first diagram looks like this:
Notice that I placed a star in the top-left box. The target question asks us to determine the number of people in this box.
Statement 1: 29 out of 42 are employed.
We get:
Since we cannot find the number of people in the top-left box, statement 1 is NOT SUFFICIENT
Statement : 24 out of 42 are students.
We get:
Since we cannot find the number of people in the top-left box, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined:
We get:
Since we still cannot find the number of people in the top-left box, the combined statements are NOT SUFFICIENT
Answer: E
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