Question 16
The partially completed histogram and the partially completed table show the times taken, to the nearest second, for a group of people to complete a puzzle.
| Time (seconds) | Frequency |
|---|---|
| 1–4 | 2 |
| 5–8 | 12 |
| 9–10 | 4 |
| 11–15 | |
| 16–20 | 6 |
a.[1]
Complete the table.
b.[1]
Work out the frequency density for the 9–10 class.
c.[2]
Complete the histogram.
d.[2]
One of the participants is selected at random.
Estimate the probability that this participant completed the puzzle in under 10 seconds.
3.4 Histograms Questions
36 exam-style questions on Edexcel A Level Maths 3.4 Histograms. Each one has a worked solution and a mark scheme showing where the marks go.