Probability Line Examples

Example 1

Put these words in order on a probability line:

Sure event, Unlikely, Likely, Impossible and even chance.

1. Draw a line with the probability at each end
Probability can be shown on a line that starts at zero and goes to one

2. Put the words in order:

Impossible, Unlikely, Even chance, Likely, Sure event

3. Place these on the probability line:

A probability line goes from zero or an impossible event to an unlikely event to an even chance to a likely event and finaly a sure thing at the other end

Example 2

Represent the given events on a probability line.

a) Getting a 3 in a throw of a dice

b) Getting an even number in a throw of a dice

c) Getting a positive number in a throw of a dice

1. Draw a line with the probability at each end

Probability can be shown on a line that starts at zero and goes to one

2. Work out the probability for each of a), b), and c) occurring.

a) Getting a 3 in a throw of a dice `=1/6=0.167`

b) Getting an even number in a throw of a dice `=3/6=1/2=0.5`

c) Getting a positive number in a throw of a dice `=6/6=1`

3. Place these on the probability line:

On a probability line the first thing to come after zero would be the chance of throwing a 3 then getting an even number then getting a positive number