probability is a measure of how likely it is that an event will happen.

Key Skills

  • use the correct words when talking about probabilities.
  • calculate probabilities for events such as rolling dice and tossing coins.
  • calculate probabilities for multiple events such as getting a head with a coin followed by a rolling a six on a die.
  • find the expected value when carrying out several trials.e.g. how many heads do you expect to get on 10 tosses of a coin?


probabilityexperimenttrialoutcomesample spaceevent, equally likely outcomes, expected value.