O-LevelMathematicsProbability4024/11 · May/June 2019 · Q184 Marks
Jim plays for his local football team. The probability that Jim plays in the next match is 0.7. If Jim plays in the match, the probability of his team winning is 0.8. If Jim does not play in the match, the probability of his team winning is 0.6.
- (a)Complete the tree diagram. [Figure of a partially completed tree diagram][2]
- (b)Calculate the probability that Jim's team wins their next match.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [2] [0].7, [0].3, [0].2, [0].4 correctly placed M1 for two or three correct
- [2] [0].74 oe M1 for 0.7 × 0.8 or 0.3 × 0.6 oe
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