WAEC 2018 · Paper 2 · Q6
| Age (years) | 20–24 | 25–29 | 30–34 | 35–39 | 40–44 | 45–49 | 50–54 | 55–59 |
|---|---|---|---|---|---|---|---|---|
| Number of workers | 22 | 24 | 30 | 38 | 36 | 30 | 18 | 12 |
The table shows the age distribution of workers in a factory.
- (a)
Using a graphical method, find the modal age of the workers.
Try it on a graph
Histogram with the crossed lines that locate the mode.
Worked solution (try it first)
- Draw the histogram: the modal class is 35–39, with the tallest bar (38).
- On the modal bar, join each top corner to the top corner of the opposite neighbour (30 on the left, 36 on the right).
- Read down from where the lines cross.
- By calculation:years.