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Bunuel
Of the 200 customers who make purchases in the men's department of a clothing store on a certain day, 120 purchase dress shirts, 100 purchase neckties, and 40 purchase both dress and neckties. How many of 200 customers purchase neither dress shirt not neckties?

A. 60
B. 50
C. 40
D. 30
E. 20

2x2 matrix

---DS---BDS---Total
NT-40---60----100
NNT-80--20----100
total--120--80---200
IMO E ; 20
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Well, I have never appeared in GMAT before therefore, I just want to know that if this is really a question of 600 level? And if the answer is no, then what is the level of the question? Just help me guys ?

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Vikas1211
Well, I have never appeared in GMAT before therefore, I just want to know that if this is really a question of 600 level? And if the answer is no, then what is the level of the question? Just help me guys ?

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This is a very popular question type (overlapping sets) on the GMAT.
This question is somewhere in the 550-600 level of difficulty.

Here's a video featuring the Double Matrix Method (it can be used for most overlapping sets questions of this nature:


Cheers,
Bret
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Bunuel
Of the 200 customers who make purchases in the men's department of a clothing store on a certain day, 120 purchase dress shirts, 100 purchase neckties, and 40 purchase both dress and neckties. How many of 200 customers purchase neither dress shirt not neckties?

A. 60
B. 50
C. 40
D. 30
E. 20

We can create the equation:

Total = Shirts + Ties - Both + Neither

200 = 120 + 100 - 40 + N

20 = N

Answer: E
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Of the 200 customers who make purchases in the men's department of a clothing store on a certain day, 120 purchase dress shirts, 100 purchase neckties, and 40 purchase both dress and neckties. How many of 200 customers purchase neither dress shirt not neckties?

A. 60
B. 50
C. 40
D. 30
E. 20

It can be written: 120+100-40+neither = 200
so, it gives: neither = 200-180 = 20
Answer: E
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