Transum Software

Frequency Trees

Use a frequency tree to show two or more events and the number of times they occurred.

Frequency Trees Exam-Style Tree Diagrams Description Help Video More Probability

34 pupils from a class were asked if they owned a bicycle. There were 19 boys and 15 girls in the class. 14 boys and 6 girls owned bicycles. Show this information on this frequency tree.

Boys

Girls

Own bicycle

No bicycle

Own bicycle

No bicycle

Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong

28 people were asked which hot beverage they would prefer if they had to choose between tea and coffee. 4 men prefered tea and 8 men prefered coffee. 13 women prefered tea and 3 women prefered coffee. Show this information on this frequency tree.

Men

Women

Tea

Coffee

Tea

Coffee

Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong

In a hotel the rooms are either single or double. Of the 27 rooms that had a sea view, 24 of them were double. Of the 28 rooms that did not have a sea view, 20 of them were single. Show this information on the diagram.

Single

Double

Sea view

No sea view

Sea view

No sea view

Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong

The following two-way table shows the eating habits of the members of a large family

Age:Eat breakfastSkip Breakfast
18 or less88
Over 1886

Complete the following frequency tree to show this information.

18 or less

Over 18

Eat breakfast

Skip Breakfast

Eat breakfast

Skip Breakfast

Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong

426 cats and 138 dogs took part (with the help of their owners!) in a food preference survey. Twice as many cats preferred fish to meat and a total of 287 animals preferred fish. Complete the following diagram with this information.

Cats

Dogs

Meat

Fish

Meat

Fish

Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Correct Wrong
Check

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

Transum.org

This web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available.

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Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.

Teachers

If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.

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© Transum Mathematics :: This activity can be found online at:
www.transum.org/Maths/Activity/Probability/Frequency_Trees.asp

Description of Levels

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Level 1 - Completing a frequency tree from given information

Exam Style questions are in the style of GCSE or IB/A-level exam paper questions and worked solutions are available for Transum subscribers.

Tree Diagrams - Calculate the probability of combined events using tree diagrams.

More on this topic including lesson Starters, visual aids and investigations.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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Example

The video above is from Mr Duncan www.999maths.com.

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly. You can double-click the 'Check' button to make it float at the bottom of your screen.

Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you don’t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.

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