5.2 Probability

• Events involving chance
• Experimental probability outcomes
• Probability outcomes in fractions, decimals or percentages

• identify events involving chance in real-life situations
• perform chance experiments in different situations
• write the experimental probability outcomes in different situations
• express the probability outcomes in fractions in different situations
• express the probability outcomes in decimals or percentages in different situations
• use IT and other materials to play games involving probability
• recognise that there are events that happen by chance in real-life situations

“When do we consider chances that an event is likely to happen?”

“Why is probability important in real-life situations?”

The titles are open to everyone. Reading a lesson needs an account — sign in or create one.

1. Events that happen by chance
   40 min · 1 practice tasks · quiz
   Sorting everyday events into certain, impossible and those that are a matter of chance.
2. How likely is it?
   40 min · 1 practice tasks · quiz
   The words we use for likelihood, and the scale from 0 to 1 that puts numbers on them.
3. Carrying out a chance experiment
   40 min · 1 practice tasks · quiz
   Running a real experiment with coins, dice or coloured balls, and recording the results properly.
4. Writing experimental probability
   40 min · 1 practice tasks · quiz
   Turning the results of an experiment into a probability, and simplifying it.
5. Probability as a fraction
   40 min · 1 practice tasks · quiz
   Working out a probability by counting, without doing any experiment at all.
6. Probability as a decimal and a percentage
   40 min · 1 practice tasks · quiz
   Writing the same probability three ways, and knowing which form suits which purpose.
7. Probability in real life
   40 min · 1 practice tasks · quiz
   How a percentage chance is used in weather, health, farming and games, and what it does not promise.