3.9 Expectation

R4 Probability

Content

R4.1

understanding that uncertain outcomes can be modelled as random events with estimated probabilities

knowing that the probabilities of an exhaustive set of outcomes sum to one

R4.2

applying ideas of randomness, fairness and equally likely events to calculate expected outcomes

R5 Diagrammatic representations

Content

R5.1

understanding and applying Venn diagrams and simple tree diagrams

• understanding that means the probability of event
• understanding that means the probability of not event
• understanding that means the probability of event or or both
• understanding that means the probability of event and

R6 Combined events

Content

R6.1

calculating the probability of combined events:

• both and ;
• neither nor ;
• either or (or both)

to include independent and dependent events

Content