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Chapter 12 Working With Data Three Siblings "I am 12 years old," said Mustafa, "and am the middle child in a three-child family. My elder brother is 17. My age is both the mean and median of the three ages. How old is my younger sister?" Click here for a hint Click here for the solution Note: Brain teasers are often open to more than one interpretation, and multiple answers may be possible. Sample solutions are shown. |