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• Probability line . • • scissors, glue pen,
RM87
A probability line can be used to show how likely an event is to happen.
It is always numbered from 0 to 1.
o _less and less likely to happen --t - more and more likely to happen - 1
I I I
impossible even chance certain

Work with a friend if you like.
m Cut out the 12 statement cards on RM 87.
I]J On a long strip of paper, make a probability number line
like the one shown below.

Decide where on the scale is the most sensible place to put the statements.

CHALLENGE
Make cards to put at these positions on the scale.
? t t t I

[!]-oo [!] [gJ 00

Practical: using statements from RM 87, a 0 b 1 c 0 a 0·5 b 0 c 0·5 a <0·5 b <0·5 c 0·5
deciding the most sensible place to put them on
~ ~ 00
a probability line.
Challenge a >0·5 b <0·5 c <0·5 a <0·5 b >0·5 c 0 a 0·5 b <0·5 c <0·5

Making cards to fit at positions marked on the Challenge
probability scale.
Open: designing more spinners, writing the chance of spinning each
colour.