# Probability (Higher - Unit 1)

 Topic: Probability Estimated teaching time: Higher 5.5 hours - 6.5 hours

## Specification references (in recommended teaching order)

 S5.1 Understand and use the vocabulary of probability and the probability scale.View assessment guidance > S5.2 Understand and use estimates or measures of probability from theoretical models (including equally likely outcomes), or from relative frequency.View assessment guidance > S5.3 List all outcomes for single events, and for two successive events, in a systematic way and derive related probabilities.View assessment guidance > S5.4 Identify different mutually exclusive outcomes and know that the sum of the probabilities of all these outcomes is 1.View assessment guidance > S5.5h Know when to add or multiply two probabilities: if A and B are mutually exclusive, then the probability of A or B occurring is P(A) + P(B), whereas if A and B are independent events, the probability of A and B occurring is P(A) × P(B) View assessment guidance > S5.6h Use tree diagrams to represent outcomes of compound events, recognising when events are independent.View assessment guidance > S5.7 Compare experimental data and theoretical probabilities.View assessment guidance > S5.8 Understand that if an experiment is repeated, this may – and usually will – result in different outcomes.View assessment guidance > S5.9 Understand that increasing sample size generally leads to better estimates of probability and population characteristics.View assessment guidance >

## Teaching resources

 Launch Exampro > Exam questions and revision materials.

Please note that, due to the overlap of C/D questions, some material may have been tagged as appropriate for both Foundation and Higher tier. Equally, due to the nature of some questions, different parts of a question may assess different topics. Teachers are advised to ensure learners have covered all of the question content before using such questions.