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ISEE Lower Level Quantitative : How to use a Venn Diagram

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Example Question #5 :Venn Diagrams

If Jill likes blue, yellow, tan and green, and Doug likes red, tan, black and green, which Venn diagram is correct?

Possible Answers:

Venn1

Venn4

Venn2

Venn3

Venn5

Correct answer:

Venn1

Explanation:

The middle portion of the diagram is the area that both circles share, so the color name that belongs in both circles should go in the middle area. Doug and Jill both like green and tan, so those colors should go in the middle. Only Jill likes blue and yellow, so these go on Jill's side. Only Doug likes red and black, so these go on Doug's side.

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Example Question #101 :Data Analysis And Probability

The following Venn diagram depicts the number of students who like soccer, football, or both. How many students like soccer but not football?

Possible Answers:

Correct answer:

Explanation:

A Venn diagram is used to demonstrate the number of people (or things) in particular categories. The regions of the circle that are overlapping indicate the number of individuals that belong to multiple groups. Therefore, based on this diagram, 12 students like soccer only, 16 like football only, and 8 like both.

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Example Question #1 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif6

The Venn diagram above represents the results from a recent survey given to middle school students. Category $\small A$ represents the amount of students that only like pizza. Category $\small B$ represents the amount of students that only chicken nuggets.

What fraction of the students only like chicken nuggets?

Possible Answers:

$\small \frac{7}{20}$

$\small \frac{5}{100}$

$\small \frac{30}{100}$

$\small \frac{100}{35}$

Correct answer:

$\small \frac{7}{20}$

Explanation:

Since exactly $\small 35$ of a total $\small 100$ percent of the students only like chicken nuggets, the solution is:
$\small \frac{35}{100}=\frac{7}{20}$

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Example Question #2 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif6

Possible Answers:

$\small \frac{3}{5}$

$\small \frac{35}{100}$

$\small \frac{6}{50}$

$\small \frac{13}{100}$

Correct answer:

$\small \frac{13}{100}$

Explanation:

Since category $\small A$ represents the total number of students that only like pizza, the correct answer is that $\small 13$ percent is equivalent to $\small \frac{13}{100}$ .

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Example Question #3 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif_2

Aracely posted a survey question using one of her social network accounts. She grouped the results into three categories. The response results are represented by the Venn diagram shown above.

Group $\small A$ represents the respondents that answered "yes" to the survey question. Group $\small B$ represents the respondents that answered "no" to the survey question. And, the overlapping part of the diagram represents the respondents that answered "maybe" to the survey question.

What percentage of the respondents answered "no" to Aracely's survey question?

Possible Answers:

$35\%$

$55\%$

$45\%$

$20\%$

Correct answer:

$35\%$

Explanation:

The Venn diagram has three separate categories. Category $\small A$ represents the respondents that answered "yes" to the survey question, category $\small B$ represents the respondents that answered "no" and the overlapping portion of the diagram represents the respondents that answered "maybe" to the survey question.

Category $\small B=35\%$ .

Thus, $\small 35\%$ of the respondents answered "no" to the survey question.

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Example Question #4 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif_2

Aracely posted a survey question using one of her social network accounts. She grouped the results into three categories. The response results are represented by the Venn diagram shown above.

Group $\small A$ represents the respondents that answered "yes" to the survey question. Group $\small B$ represents the respondents that answered "no" to the survey question. And, the overlapping part of the diagram represents the respondents that answered "maybe" to the survey question.

What fraction represents the amount of respondents that answered "yes" to the survey question?

Possible Answers:

$\small \frac{1}{5}$

$\small \frac{4}{10}$

$\small \frac{1}{4}$

$\small \frac{2}{5}$

Correct answer:

$\small \frac{1}{5}$

Explanation:

The Venn diagram shows that exactly $\small 20$ percent of the survey respondents answered "yes" to the survey question.

Thus, to find the fraction equivalent we need to rewrite

$20\% \rightarrow \frac{20}{100}$

从这里我们简化分数。

$\frac{20}{100}=\frac{2}{10}=\frac{1}{5}$

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Example Question #5 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif_lp

The Venn diagram shown above has three categories that represent information about the Wildcats varsity baseball team.

Category $\small L$ represents the number of players on the team that are left-handed.
Category $\small P$ represents the numebr of players on the team that are pitchers.
And, the overlapping portion of the Venn diagram represents the number of players that are left-handed pitchers.

Given that $\small L=6, P=9$ and that there are $\small 3$ players in the overlapping region of the diagram.

How many players are right-handed pitchers?

Possible Answers:

Correct answer:

Explanation:

Since the question provides the information that there are $\small 3$ left-handed pitchers and $\small 9$ total pitchers, one can infer that the number of right-handed pitchers is equal to the difference between the total number of pitchers and the number of left-handed pitchers.

Thus, the solution is:

9-3=6

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Example Question #6 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif_lp

Possible Answers:

$\small \frac{1}{5}$

$\small \frac{3}{6}$

$\small \frac{1}{6}$

$\small \frac{4}{5}$

Correct answer:

$\small \frac{1}{5}$

Explanation:

Since, there are $\small 6$ left-handed players total and $\small 3$ left-handed pitchers there must be $\small 3$ players that are left-handed but do not pitch, because $\small 6-3=3$ .

To find what fraction this represents we need to do:

$\frac{\text{left handed}}{\text{total players}}=\frac{3}{15}=\frac{1}{5}$

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Example Question #7 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif3

In the above Venn diagram category $\small A$ represents the number of Kevin's friends that play the flute, while category $\small B$ represents the number of Kevin's friends that play the bass.

If $\small \frac{2}{8}$ of Kevin's friends only play the flute and $\small \frac{2}{8}$ of his friends only play the bass, then what fraction of Kevin's friends play both instruments?

Possible Answers:

$\small \frac{6}{8}$

$\small \frac{2}{8}$

$\small \frac{1}{2}$

$\small \frac{2}{3}$

Correct answer:

$\small \frac{1}{2}$

Explanation:

To find the fraction of Kevin's friends that play both the bass and the flute, consider that the fraction $\small \frac{8}{8}$ represents all of Kevin's friends in this senario.

Thus, the solution can be found by adding those that only play flute with those that only play bass and subtracting that final answer from the fraqction that represents all of Kevin's friends:

$\small \small \frac{2}{8}+\frac{2}{8}=\frac{4}{8}$

$\frac{8}{8}-\frac{4}{8}=\frac{8-4}{8}=\frac{4}{8}=\frac{1}{2}$

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Example Question #8 :How To Use A Venn Diagram

Custom_vt_venn_d._lower_level_isee.gif3

Possible Answers:

$20\%$

$25\%$

$15\%$

$40\%$

Correct answer:

$25\%$

Explanation:

$\small \frac{2}{8}$ of Kevin's friends only play the bass.

Thus, to find the fractional equivalent we need to multiply the fraction by 100.

The solution becomes:

$\frac{2}{8}\times100 = \frac{200}{8}=\frac{25}{1}= 25$

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ISEE Lower Level Quantitative : How to use a Venn Diagram

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

All ISEE Lower Level Quantitative Resources

Example Questions

Example Question #5 :Venn Diagrams

Example Question #101 :Data Analysis And Probability

Example Question #1 :How To Use A Venn Diagram

Example Question #2 :How To Use A Venn Diagram

Example Question #3 :How To Use A Venn Diagram

Example Question #4 :How To Use A Venn Diagram

Example Question #5 :How To Use A Venn Diagram

Example Question #6 :How To Use A Venn Diagram

Example Question #7 :How To Use A Venn Diagram

Example Question #8 :How To Use A Venn Diagram

All ISEE Lower Level Quantitative Resources

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