Probability Line
Probability is the chance that something will happen. It
can be shown on a line.
We can say that the probability of an event occurring will be somewhere
between impossible and certain. As well as words we can use fractions or decimals to show the probability
of something happening. Impossible is zero and certain is
one. A fraction probability line is shown below.
We can show on our line the chance that something will happen:
a) The sun will rise tomorrow.
b) I will not have to learn maths at school.
c) If I flip a coin it will land heads up.
d) If you have a choice of red, yellow, blue or green you will choose
red.
Remember the probability of an event will not be more
than 1.
This is because 1 is certain that something will happen.
And the probability of an event will not be less
than 0.
This is because 0 is impossible (sure that something will not happen).
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