EM-2938
Histograms
E Math · Secondary 4 · Hard · Histograms
In a histogram, the time spent on revision by students is grouped. One class interval is 8–12 hours with frequency 10, and the next is 12–16 hours with frequency 20. What is the ratio of the frequency densities of these two classes?
- 1 : 2
- 2 : 1
- 1 : 4
- 4 : 1
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