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venn diagram

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by cgt2k1 » Mon Dec 16, 2013 2:01 pm
Hi

Below is a question on venn diagrams.I dont have the answer choices but I have the OA

Out of 75 students in a class 48 eat pizza , 45 eat hot dogs and 58 eat tacos.38 eat pizzas and hot dogs,37 eat hot dogs and tacos and 40 eat pizza and tacos.There are 25 students who eat all 3.How many students eat none or only one of the items
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Source: — Problem Solving |

by GMATGuruNY » Mon Dec 16, 2013 3:19 pm
The problem should read as follows:
A survey was conducted to determine the popularity of 3 food among students. The data collected from 75 students is summarized as below

48 like Pizza
45 like Hoagies
58 like tacos
28 like pizza and hoagies
37 like hoagies and tacos
40 like pizza and tacos
25 like all three food

What is the number of students who like none or only one of the foods?

A. 4
B. 16
C. 17
D. 20
E. 23
Draw a VENN DIAGRAM representing the following:
75 Total
48 like pizza
45 like hoagies
58 like tacos
N = ?

Image

Complete the Venn diagram by working from the INSIDE OUT.

25 like all 3 foods:
Image

28 like pizza and hoagies
37 like hoagies and tacos
40 like pizza and tacos

Subtracting from these figures the 25 who like all 3 foods, we get:
Image

Subtracting the values in the diagram from P=48, H=45, and T=58, we get:
Image

Subtracting the values in the diagram from Total = 75, we get:
Image

Thus:
Only P + Only H + Only T + N = 5 + 5 + 6 + 4 = 20.

The correct answer is D.
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by cgt2k1 » Mon Dec 16, 2013 3:35 pm
thanks

I got lost in the part for P+H ,P+T and H+T instead of subtracting from 25 I used the values as they are and got confused
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