Year 9 probability practice
Year 9 probability practice with compound events
Probability questions can look repetitive unless students see different contexts and patterns. MathsBoost gives Year 9 students short sets with varied compound probability questions.
Skills covered
Independent events, without replacement, spinners, counters, simple tree diagrams and probability complements.
Mistake review
Wrong answers are saved so students can revisit calculation slips, denominator errors and event-order mistakes.
Sample practice questions
Question 1
A spinner has 4 blue and 6 red sections. It is spun twice. What is P(blue then red)?
Answer: 6/25
Use 4/10 × 6/10.
Question 2
A bag has 5 blue and 3 green counters. Two counters are picked without replacement. What is P(both blue)?
Answer: 5/14
Use 5/8 × 4/7.
Question 3
If P(rain) = 0.35, what is P(no rain)?
Answer: 0.65
Use the complement: 1 - 0.35.