CAIE A-Level Mathematics AS 5.3.4 Elementary Probability Questions
Practise solving conditional probability problems with tables, tree diagrams and dependent events.
- Syllabus
- 2028–2030
- Course
- Mathematics 9709
- Level
- AS
Exam points
- calculate conditional probabilities from tables and event information
- construct and use tree diagrams for dependent selections
- solve multi-stage conditional probability problems
CAIE A-Level Mathematics AS 5.3.4 Elementary Probability Questions question 1
[Maximum number: 2]
The numbers on the faces of a fair six-sided dice are 1,2,2,3,3,3. The random variable X is the total score when the dice is rolled twice.
Find the probability that X is even given that X>3.
Given that X>3, the possible values are 4,5,6. Thus,
P(X is even∣X>3)=36313610+369=3119=0.613.
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