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  5. There are 7 billion people in the world, and 5.1 billion of ...

There are 7 billion people in the world, and 5.1 billion of them have a cell phone, and 4 billion have a toothbrush.

Chuck Martin
Phones, Cells, People
There are 7 billion people in the world, and 5.1 billion of them have a cell phone, and 4 billion have a toothbrush.