2.1: All 7.4 Billion of Us
There are 7.4 billion people in the world. If the whole world were represented by a 30-person class:
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14 people would eat rice as their main food.
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12 people would be under the age of 20.
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5 people would be from Africa.
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How many people in the class would not eat rice as their main food?
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What percentage of the people in the class would be under the age of 20?
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Based on the number of people in the class representing people from Africa, how many people live in Africa?