GRE
The average (arithmetic mean) of the values in D
The median of the values in D
The median of the distribution of X
-$$\frac{9}{5}$$
The number of ordered triples ($$x_1$$, $$x_2$$, $$x_3$$), where $$x_1$$, $$x_2$$ and $$x_3$$ are non-negative integers such that $$x_1$$+$$x_2$$+$$x_3$$=9
55
25000 +道题目
198本备考书籍