Sunday, October 7, 2012

Statistics

Suppose that 3% of births give rise to twins. What percentage of the population is a twin: 3%, less than 3%, or more than 3%?


Puzzle Answer

Answer:

More than 3% of the population are twins. Out of 100 births, 97 are single and 3 are twins. That's 103 babies in total, six of which are twins, which represents 5.8% of the population.

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