推 AKgOd:請問f怎麼消掉 卡住了 想不通 11/09 17:38
→ catspace:如果PP答案是對的話，應該是題目有誤，f應該是數字才對 11/09 18:00
※ 引述《AKgOd (Myth.EmPtY)》之銘言：
: What is the average height of the n people in a certain group?
: (1) The average height of the n/3 tallest people n the group is
: 6feet2又1/2inches, 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
: Thx
(1)可以得知總身高為n的關係式，求平均數時可以消去n得出數字
(2)n不確定不能得知正確數
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