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Calculate the Number of Different Combinations of Ice Creams

In this worksheet, students will work out the number of combinations that are possible.

'Calculate the Number of Different Combinations of Ice Creams' worksheet

Key stage:  KS 3

Year:  Year 7 Maths worksheets

Curriculum topic:   Probability

Curriculum subtopic:   Record, Describe and Analyse Probability Experiments

Difficulty level:  

Worksheet Overview

A combination is a way of selecting something out of all the different options where the order doesn't matter.

To work out the total number of combinations, we can multiply together the numbers of different options.

 

Example

ice creams

 

Jack goes to buy an Italian ice cream.

He can choose from a small cone, a medium cone or a large cone. 

There are 30 flavours. 

He can have his ice cream with a wafer or without.

 

How many different combinations are there?

 

Answer

There are 3 sizes.

There are 30 flavours.

That means that, so far, there are 3 x 30 = 90 different combinations.

 

There are 2 options for the wafer (with or without).

So there are now 3 x 30 x 2 = 180 combinations.

 

That's a lot of different combinations - if you had a different one every day, it would still take you six months before you'd have had them all!

It might not be such a good food choice though - ice cream might well be delicious but eating one every day could lead to some health issues!

 

girl eating ice cream

 

Let's have a go at some questions now.

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