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Out of 20 boys, 6 are each of 1 m 15 cm height, 8 are of 1 m 10 cm and rest of 1 m 12 cm. The average height of all of them is :
- A. 1 m 12.1 cm
- B. 1 m 21.1 cm
- C. 1 m 21 cm
- D. 1 m 12 cm
Answer: Option A
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