- A10–20
- B30–40
- C0–10
- D20–30
Step-by-Step Solution
Total frequency n = 40, so n/2 = 20. Cumulative frequencies are 5, 13, 25, 35, 40. The first one to reach or pass 20 is 25, which belongs to the class 20–30.
Answer: D) 20–30
For the distribution 0–10: 5, 10–20: 8, 20–30: 12, 30–40: 10, 40–50: 5 (class interval: frequency), the median class is:
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