GRE
$$a_{20}$$
$$\sqrt{401}$$
The area of the region enclosed by ABCD
155
9 times the number of rounds in which the contestant scored for 2 points
The number of rounds in which the contestant scored for 4 points
n
33
The standard deviation of data set X
The standard deviation of data set Y
The standard deviation of the original five tax bills
The standard deviation of the resulting five tax bills after the four lowest tax bills were reduced
P (R <1.375x)
P (T <1.25x)
$$\frac{n!}{(\frac{n}{2})!}$$
2($$\frac{n}{2}$$)!
25000 +道题目
236本备考书籍