作业帮英数题：Five test scores have a mean(average score)of 90,a media
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英数题：Five test scores have a mean(average score)of 90,a median"(middle score)of 91 and a mode
Five test scores have a mean(average score)of 90,a median"(middle score)of 91 and a mode(most frequent score)of 94.The sum of the two lowest test score is__________
(A)170 (B)171 (C)176 (D)177 (E)not determined by the information giver
Five test scores have a mean(average score)of 90,a median"(middle score)of 91 and a mode(most frequent score)of 94.The sum of the two lowest test score is__________
(A)170 (B)171 (C)176 (D)177 (E)not determined by the information giver
B,五个数中间的那个中位数是91,最高的两个都是94,所以最低的两个和是90*5-91-94-94=171.
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