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  3. A group of 20 values has a mean of 85 and a median of 80. A different group of 3

A group of 20 values has a mean of 85 and a median of 80. A different group of 3

游客2025-02-24  24
问题 A group of 20 values has a mean of 85 and a median of 80. A different group of 30 values has a mean of 75 and a median of 72.
(a)What is the mean of the 50 values?
(b)What is the median of the 50 values? [br]
选项
答案 mean = 79
解析
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