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II Probability line II II scissors, long strip of
paper, glue pen, RM26
A probability line can be used to show how likely an event is to happen.
It is usually numbered from 0 to 1, but this one shows percentages.
0% 25% 50% 75% 100%
impossible even chance certain
Work with a friend if you like.
Cut out the statement cards on RM 26.
On a long strip of paper, make a probability line like the one below.
Decide where on the scale is the most sensible position for the statements.
We've put this statement between
0% and 25% since we think
there's a less than 25 % chance
of it happening.
2 5°/o 50°/o 750/0
Even cnance
Gerba.in .·
4 Complete each statement card by writing the probability
of each event occurring as a percentage.
You may be able to do this exactly,
or you might have to estimate.
There is a 40% chance
of it snowing tomorrow
in Scotland.
CHALLENGE
• Design statement cards about future weather.
• Estimate the probability of the statement
becoming true.
I STEPS 5:12 I
