- A9.44
- B9
- C10.2
- D8.8
Step-by-Step Solution
Mean ; MD .
Answer: A) 9.44
Ages of 50 visitors to a library: 0–10 years – 5, 10–20 – 8, 20–30 – 15, 30–40 – 16, 40–50 – 6. Find the mean deviation about the mean.
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