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# Probability Scales

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by

## Mr Mattock

on 5 June 2018

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#### Transcript of Probability Scales

Probability Scales
Starter
If certain means probability of 1, how would you describe probability of 0?

How would you describe a probability of 0.5?
Words and Probability Scales
Impossible Unlikely Evens Likely Certain
Using words
L.O. - Understand the words that relate to probability and apply these ideas to the idea of a probability scale.
0 0.5 1
B
E
C
A
Main Activity
Complete the RAG Sheet
Red
A
B
C
D
Amber
B
G
Y
Green
(a) The probability of square and triangle are both 0.5.

Certain

Likely

(b) triangle is less likely than square.

Higher than 5 because there are 4 cards left higher than 5 and only 3 lower than 5 (4/7 > 3/7)
Example
Example
Activities
Activity