Re: [計量] The table above shows the average ...
※ 引述《luckykudo (不問歲月任風歌)》之銘言：
: Month Average Price per Dozen
: April $1.26
: May $1.20
: June $1.08
: The table above shows the average (arithmetic mean) price per dozen
: of the lare grade A eggs sold in a certain store during three successive
: months. If 2/3 as many dozen were sold in April as in May, and twice as
: many were sold in June as in April, what was the average price per dozen
: of eggs sold over the three-month period?
: (A) $1.08
: (B) $1.10
: (C) $1.14
: (D) $1.16
: (E) $1.18
: 照題目的意思來看
: 我的算法
: A:M:J=6:4:3
: 1.26*6+1.2*4+1.08*3=15.6
: 15.6/(6+4+3)=1.2→沒選項....
: 不知道哪個環節出錯...
: 老師解答是給(D)
題目的意思好像是
2/3 as many dozen were sold in April as in May
-> A:M = 2/3 : 1 = 2:3
twice as many were sold in June as in April
->A:J = 1:2
故 A:M:J = 2:3:4
1.26*2+1.2*3+1.08*4=10.44
10.44/9=1.16
應該是這樣吧
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