GRE
The arithmetic mean of the integers in the set
20
$$3b$$
$$c+9$$
N
48
The standard deviation of the distribution of X
The standard deviation of the distribution of Y
$$(c-d)^3+3(c-d)^2d+3(c-d)d^2+d^3$$
$$c^3$$
The volume of a hemisphere (half of a sphere) that has radius $$k$$
The volume of a right circular cylinder that has height $$k$$ and whose base has radius $$k$$
The probability that neither event E nor event F occur
0.20
The sum of the first n positive prime numbers
The sum of the first n positive integers
$$y-x$$
3
The radius of the circle
$$\frac{x+y}{2}$$
The expected value of X
The expected value of Y
25000 +道题目
245本备考书籍
