The histogram shows the times taken for a group of people to complete a puzzle.
| Time (seconds) | Frequency Density |
|---|---|
| 0 - 30 | 1 |
| 30 - 60 | 1 |
| 60 - 90 | 4 |
| 90 - 120 | 8 |
| 120 - 150 | 6 |
The number of people who completed the puzzle in more than 150 minutes is 120.
Estimate the percentage of people who took less than 90 minutes to complete the puzzle.
Practise Edexcel A Level Maths Representations of Data with exam-style questions for A Level Maths. 10 questions covering 3.1 Outliers, 3.2 Box Plots, 3.3 Cumulative Frequency, 3.4 Histograms, and 3.5 Comparing Data, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
