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The average annual increase in the number of urbanites in developing countries, from 1950 to 2000 A.D. was close to

  • A.30 million
  • B.40 million
  • C.50 million
  • D.60 million

Answer: A

The urban population in developing countries rose from 300 million in 1950 to 2 billion in 2000, a rise of 1,700 million over 50 years.

\[ \frac{2000-300}{50}=34\ \text{million per year} \]

The figure of 34 million is closest to 30 million among the options, since 40 million a year would be 2,000 million over the period. The answer is 30 million.

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