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R:x,y,z,2.7,3.8,5.5
S:x,y,z,-2.7,-3.8,-5.5
If the average (arithmetic mean) of the 6 numbers in list R is r and the average of the 6 numbers in list S is s, then r-s is the average of which of the following lists?
S:x,y,z,-2.7,-3.8,-5.5
If the average (arithmetic mean) of the 6 numbers in list R is r and the average of the 6 numbers in list S is s, then r-s is the average of which of the following lists?
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以上解析由 考满分老师提供。