PP- T2- DS132

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133. 14229-!-item-!-187;#058&010329
What is the average (arithmetic mean) height of the n people in a certain group?

(1) The average height of the tallest people n the group is 6 feet 2 inches, and the average height of the rest of the people n the group is f feet 10 inches.

(2) The sum of the heights of the n people is 178 feet 9 inches.


Ans:A

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這裡的第一題喔
http://www.formosamba.com/phpBB3/viewtopic.php?t=11635

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感謝回復

What is the average (arithmetic mean) height of the n people in a certain group?

(1) The average height of the tallest people n the group is 6 feet 2 inches, and the average height of the rest of the people n the group is five feet 10 inches.

(2) The sum of the heights of the n people is 178 feet 9 inches.

原來是題目沒給清楚