AMC 8 2007 Problem 1

AMC8 2007 年第 1

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Theresa's parents have agreed to buy her tickets to see her favorite band if she spends an average of 10 hours per week helping around the house for 6 weeks. For the first 5 weeks she helps around the house for 8, 11, 7, 12 and 10 hours. How many hours must she work for the final week to earn the tickets?
如果特蕾莎平均每周花 10 个小时在家里帮忙,一共帮忙 6 周,那么她的父母就同意给她买票去看她最喜欢的乐队。在最初的 5 周里,她在家里帮忙了 8,11,7,12 和 10 个小时。最后一周她必须工作多少小时才能挣到票?
  1. A.9
  2. B.10
  3. C.11
  4. D.12
  5. E.13

正确答案 · Correct Answer

D

解析 · Solution

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