SSAT Middle Level Math : Venn Diagrams

Study concepts, example questions & explanations for SSAT Middle Level Math

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Example Questions

Example Question #3 : How To Use A Venn Diagram

Vt custom venn series ssat middle

Results from a recent political poll are represented by the Venn diagram above. The results indicate the percentage of voters who have only voted for Democratic presidential candidates, only Republican presidential candidates, and those that have voted for both Democratic and Republican candidates in the past.  

What percentage of respondents have voted for both Democratic and Republican presidential candidates?

Possible Answers:

Not enough information is provided. 

Correct answer:

Explanation:

To solve this problem first find the sum of the two exclusive groups shown in the Venn diagram: 



This means that  of respondents have exclusively voted for presidential candidates from only one political party. 

To find the value of the common portion of the Venn diagram, calculate the difference between  and :



This means that  of the respondents have voted for both Democratic and Republican presidential candidates. 

Example Question #22 : Venn Diagrams

Vt custom venn series ssat middle

The above Venn diagram represents survey respondents from a recent political poll. Based on the respondent's political affiliation, they were classified into group  only,  only or both groups. 

What fraction of respondents were classified into only group 

Possible Answers:

Correct answer:

Explanation:

Since the information provided in the Venn diagram represents percentages, convert the quantity in category  from a percentage to a fraction. To convert a percentage to a fraction, divide the percent by a divisor of , then simplify the fraction if applicable; however, in this case the fraction can't be reduced. 

The solution is: 

Group 

Thus:
 


Example Question #23 : Venn Diagrams

Vt custom venn series ssat middle

The above Venn diagram represents the total number of respondents from a survey administered in . Respondents were categorized into only group , only group  or both of the groups. 

What fraction of the respondents were categorized into both groups? 

Possible Answers:

Correct answer:

Explanation:

Since the information provided in the Venn diagram represents percentages, convert the quantity in the common portion of the diagram from a percentage to a fraction. To convert a percentage to a fraction, divide the percentage by a divisor of , then simplify the fraction if possible. 

Common portion is equal to . Therefore, the solution is:

 

Example Question #221 : Data Analysis

Vt custom venn series ssat middle

Ms. Dunn gave her class a survey to find out which states her student's have visited. Ms. Dunn was surprised to find that all of her student's had visited either New York City or Texas, and some of her student's had visited both locations. 

The above Venn diagram represents the percentage of students who have visited only NYC, only Texas, and those who have visited both locations. 

What percentage of the students have visited both NYC and Texas? 

Possible Answers:

Correct answer:

Explanation:

The common portion of this Venn diagram represents the percentage of respondents that were classified into both groups. In order to calculate the percentage that represents how many students have visted both NYC and Texas, first find the sum of group  and group . Then subtract that quantity from .

The solution is: 



Example Question #22 : Venn Diagrams

Vt custom venn series ssat middle

Ms. Dunn gave her class a survey to find out which states her student's have visited. Ms. Dunn was surprised to find that all of her student's had visited either New York City or Texas, and some of her student's had visited both locations. 

The above Venn diagram represents the percentage of students who have visited only NYC, only Texas, and those who have visited both locations. 

What ratio represents the number of students that have gone only to NYC, in comparison to the rest of the class? 

Possible Answers:

Correct answer:

Explanation:

Since  of Ms. Dunn's class have visited only NYC,  out of every  students must have only visited NYC. This can be represented by the ratio ; however, this ratio does not appear as an answer choice, so we must reduce this ratio by dividing each part by their greatest common divisor. 

The solution is:




Example Question #23 : Venn Diagrams

Vt custom venn series ssat middle

Kayla used a popular social media website to survey her friends' hobbies. All of her friends either play sports or enjoy playing video games, and some of her friends do both. 

What fraction of her friends only play sports? 

Possible Answers:

Correct answer:

Explanation:

In order to calculate the fraction of Kayla's friends who only play sport, first find the sum of the common portion and video game portion of the Venn diagram. Then subtract that sum from  whole. 

The solution is: 



Note: 

Thus, 

This means that half of Kayla's friends only play sports. 

Example Question #23 : Venn Diagrams

Vt custom venn series ssat middle

Kayla used a popular social media website to survey her friends' hobbies. All of her friends either play sports or enjoy playing video games, and some of her friends do both.

What percentage of Kayla's friends play sports and video games?

Possible Answers:

Correct answer:

Explanation:

In order to solve this problem, identify that the common portion of this Venn diagram represents Kayla's friends who play sports and video games. Since  of her friends play sports and video games, convert this fraction to a percent.

The solution is:




Note: the most efficient way to convert this fraction to a percent is to find an equivalent fraction to  with a denominator of 

Example Question #21 : Venn Diagrams

Vt custom venn series ssat middle

The above Venn diagram represents the total number of respondents from a survey administered in . Respondents were categorized into only group , only group  or both of the groups. 

What percentage of respondents were categorized into only group 

Possible Answers:

Correct answer:

Explanation:

To find the missing quantity for category , first calculate the sum from the common portion of the Venn diagram and category . Then, subtract that sum from  , because the total percentage of respondents must equal 

The algebraic solution is:



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