[計量] The table above shows the average ...
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)
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