relative frequency and probability are measures of how likely it is that an event will happen.

a tree diagram is a diagram that allows choices and outcomes for a sequence of events to be displayed.

Key Skills


  • calculate relative frequencies from a frequency table
  • calculate probabilities for events such as rolling dice and tossing coins.
  • given a set of choices arrange them in a tree diagram
  • find and calculate outcomes from a tree diagram
Vocabulary probabilityexperimenttrialoutcomesample spaceevent, equally likely outcomes, tree diagram