GRE
$$x$$
$$y$$
The standard deviation of the n numbers $$x_{1}, x_{2},...x_{n}$$
The standard deviation of the n numbers $$x_{1}+c, x_{2}+c,...x_{n}+c$$
The greatest possible number of members present if the two committees meet in a joint session
18
The amount of interest earned by the two deposits from May 1, 1994, to May 1,1996
$900
25000 +道题目
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