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Q: .
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  • A. 18
  • B. 22
  • C. 31
  • D. 25
Correct Answer: Option B - : Number of persons less than 20 years = 2 + 7 + 6 + 7 = 22
B. : Number of persons less than 20 years = 2 + 7 + 6 + 7 = 22

Explanations:

: Number of persons less than 20 years = 2 + 7 + 6 + 7 = 22