统计简单计算题(英文)Ten values have a mean of 75. Nine of the values are 62,78,90,87,56,92,70,70 and 93,Fine the tenth value.

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统计简单计算题(英文)Ten values have a mean of 75. Nine of the values are 62,78,90,87,56,92,70,70 and 93,Fine the tenth value.

统计简单计算题(英文)Ten values have a mean of 75. Nine of the values are 62,78,90,87,56,92,70,70 and 93,Fine the tenth value.
统计简单计算题(英文)
Ten values have a mean of 75. Nine of the values are 62,78,90,87,56,92,70,70 and 93,Fine the tenth value.

统计简单计算题(英文)Ten values have a mean of 75. Nine of the values are 62,78,90,87,56,92,70,70 and 93,Fine the tenth value.
75*10-62-78-90-87-56-92-70-70-93
=52

您好:
mean在此是平均数的意思,共10项
∴总数是75*10=750
∵其中9个分别是62,78,90,87,56,92,70,70,93
∴第10个数据是
750-(62+78+90+87+56+92+70+70+93)
=750-698
=52
谢谢!