Probability 
Summary

probability is a measure of how likely it is that an event will happen.
a tree diagram allows choices and outcomes for a sequence of events to be displayed.

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
 given a set of choices arrange them in a tree diagram
 calculate outcomes from a tree diagram

Vocabulary

median, tree diagram, stem and leaf diagram, probability,experiment, trial, outcome, sample space, event, equally likely outcomes, expected value.
