GRE
The average (arithmetic mean) of x, y and z
z
$$(n)^{-1}(n+1)^{-1}$$
$$(2n+1)^{-1}$$
x
$$\frac{5}{2}$$
y+z
$$x^{2}+(\frac{1}{x})^{2}$$
$$(x+\frac{1}{x})^{2}$$
$$\frac{M(a^{2}+b^{2})}{12}$$
$$\frac{M(a+b)^{2}}{12}$$
The number of tables occupied by only 1 person
9
The median of $$s_{1}$$, $$s_{3}$$, $$s_{5}$$, $$s_{6}$$, $$s_{7}$$
130
25000 +道题目
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