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What is the average (arithmetic mean) height of the n people [#permalink]
10 Oct 2005, 11:15
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What is the average (arithmetic mean) height of the n people in a certain group?
(i) The average height of the n/3 tallest people in the group is 6 feet 2 1/2 inches, and the average height of the rest of the people in the group is 5 feet 10 inches
(ii) The sum of th eheights of the n people is 178 feet 9 inches.