Write the natural numbers from 50 to 70 . What fraction of them are prime numbers?
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- Natural numbers from 2to12: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
- Prime numbers from 2 to12: 2, 3, 5, 7, 11
- Hence, fraction of prime numbers =5/11
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