53. Over a year, Brendan sold an average of 12 umbrellas per day on rainy days, and an average of 3 umbrellas per day on clear days. If the weather was rainy one day in five, and this was not a leap year, what was Brendan’s average daily umbrella sales for the year?
(A) 4.8
(B) 5.2
(C) 6.75
(D) 7.3

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統計: A(4), B(3), C(1), D(2), E(0) #2320010

詳解 (共 3 筆)

#4004403

(365*12*1/5 + 365*3*4/5 )/365=4.8 哪裡算錯了嗎???????

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#4921538


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#4327725

我也算4.8...哪裡算錯了!!?????

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