- A10–20
- B60–70
- C40–50
- D20–30
Step-by-Step Solution
The modal class is the class with the greatest frequency. The largest frequency is 20, which belongs to the class 40–50.
Answer: C) 40–50
For the grouped data 0–10: 7, 10–20: 14, 20–30: 13, 30–40: 12, 40–50: 20, 50–60: 11, 60–70: 15 (class interval: frequency), the modal class is:
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