O-LevelMathematicsStatistics4024/12 · May/June 2021 · Q244 Marks
A group of office workers are each asked to record the distance, d kilometres, they travel to work. The results for some of their journeys are shown in the histogram. [Figure 24.1]
- (a)There were 20 workers in the 0 < d ≤ 5 group. There were 12 workers in the 20 < d ≤ 40 group. Complete the histogram.[1]
- (b)Calculate the percentage of workers who travelled more than 20 km to work.[3]
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 2021). The mark or mark type is shown in brackets.
- [1] (a) Correct bar height 0.6
- [3] (b) 15
- [3] (b) M2 for 12 / (20 + 6 × 5 + 1.8 × 10 + 12) [× 100]
- [3] (b) or M1 for 6 × 5 and 1.8 × 10 soi as frequencies
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