A certain question bank has 64 GMAT questions. Of these, 22 deal with integers, and 25 are Problem Solving (PS) questions. How many questions are PS questions that deal with integers?
>(1) Of the questions that deal with integers, there are four more nonPS questions than PS questions.
>(2) Of the PS questions, there are seven more questions that do not deal with integers than questions that do deal with integers.
Stat. (1): Add "
Of the questions that deal with integers, there are four more nonPS questions than PS questions." to the table. Put $$\color{blue}{x+4}$$ in the NoPS/Integer box and $$\color{blue}{x}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{x}$$ 

$$25$$

NonPS 
$$\color{blue}{x+4 }$$ 

$$39$$

Total 
$$22$$ 
$$42$$ 
$$64$$

From the Integer column, it follows that
>$$x+(x+4)=22$$
This uniquely determines the value of $$x$$, which is equal to the required quantity. Therefore, **Stat.(1) → S → AD**. So E is incorrect.
Stat. (2): Add "
Of the PS questions, there are seven more questions that do not deal with integers than questions that do deal with integers." to the table. Put $$\color{blue}{y+7}$$ in the PS/NoInteger box and $$\color{blue}{y}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{y}$$ 
$$\color{blue}{y+7}$$ 
$$25$$

NonPS 


$$39$$ 
Total 
$$22$$ 
$$42$$ 
$$64$$

From the PS row, it follows that
>$$y+(y+7)=25$$.
This uniquely determines the value of $$y$$, which is equal to the required quantity. Therefore, **Stat.(2) → S → D**.
Stat. (1): Add "
Of the questions that deal with integers, there are four more nonPS questions than PS questions." to the table. Put $$\color{blue}{x+4}$$ in the NoPS/Integer box and $$\color{blue}{x}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{x}$$ 

$$25$$

NonPS 
$$\color{blue}{x+4 }$$ 

$$39$$

Total 
$$22$$ 
$$42$$ 
$$64$$

From the Integer column, it follows that
>$$x+(x+4)=22$$
This uniquely determines the value of $$x$$, which is equal to the required quantity. Therefore, **Stat.(1) → S → AD**. So C is incorrect.
Stat. (1): Add "
Of the questions that deal with integers, there are four more nonPS questions than PS questions." to the table. Put $$\color{blue}{x+4}$$ in the NoPS/Integer box and $$\color{blue}{x}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{x}$$ 

$$25$$

NonPS 
$$\color{blue}{x+4 }$$ 

$$39$$

Total 
$$22$$ 
$$42$$ 
$$64$$

From the Integer column, it follows that
>$$x+(x+4)=22$$
This uniquely determines the value of $$x$$, which is equal to the required quantity. Therefore, **Stat.(1) → S → AD**. So B is incorrect.
Stat. (2): Add "
Of the PS questions, there are seven more questions that do not deal with integers than questions that do deal with integers." to the table. Put $$\color{blue}{y+7}$$ in the PS/NoInteger box and $$\color{blue}{y}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{y}$$ 
$$\color{blue}{y+7}$$ 
$$25$$

NonPS 


$$39$$ 
Total 
$$22$$ 
$$42$$ 
$$64$$

From the PS row, it follows that
>$$y+(y+7)=25$$.
This uniquely determines the value of $$y$$, which is equal to the required quantity. Therefore, **Stat.(2) → S → BD**. So A is incorrect.
Incorrect.
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Now check stat. (1).
Correct.
[[snippet]]
Now check the statements.
Stat. (1): Add "
Of the questions that deal with integers, there are four more nonPS questions than PS questions." to the table. Put $$\color{blue}{x+4}$$ in the NoPS/Integer box and $$\color{blue}{x}$$ in the PS/Integer box.
 Integer  Notinteger
 Total 
PS 
$$\color{red}{?} = \color{blue}{x}$$ 

$$25$$

NonPS 
$$\color{blue}{x+4 }$$ 

$$39$$

Total 
$$22$$ 
$$42$$ 
$$64$$

From the Integer column, it follows that
>$$x+(x+4)=22$$
This uniquely determines the value of $$x$$, which is equal to the required quantity. Therefore, **Stat.(1) → S → AD**.
Incorrect.
[[snippet]]
Now check stat. (1).
Incorrect.
[[snippet]]
If you check stat. (1):
Incorrect.
[[snippet]]
If you check Stat.(2):
Statement (1) ALONE is sufficient, but Statement (2) alone is not sufficient to answer the question asked.
Statement (2) ALONE is sufficient, but Statement (1) alone is not sufficient to answer the question asked.
BOTH Statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.
EACH statement ALONE is sufficient to answer the question asked.
Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.
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