CIE · IGCSE · Mathematics
One real Mathematics question.
No signup. 30 seconds.
Topic: Statistics. Pick an answer — get the mark scheme instantly.
Question · Difficulty 2/3
A researcher recorded the waiting times, in minutes, of 80 patients at a hospital clinic. The data is shown in the cumulative frequency table below. | Waiting time (w minutes) | w ≤ 10 | w ≤ 20 | w ≤ 30 | w ≤ 40 | w ≤ 50 | |-------------------------|--------|--------|--------|--------|--------| | Cumulative frequency | 8 | 24 | 48 | 68 | 80 | How many patients waited more than 30 minutes but not more than 40 minutes?
Tap an option to see the mark scheme
Pick your board & subject
Try a real question from the bank — no signup needed.