GRE
x
y
xy
86
The number of different positive 4-digit integers in which two of the digits are equal to 5 and the other two digits are equal to 7
6
The probability that neither R nor T will occur
0.47
$$\frac{The lengh of ST}{The lengh of TU}$$
$$\frac{The area of △RST}{The area of △TUV}$$
The perimeter of △ABC
$$6r$$
n
18
The x -coordinate of the vertex at the right angle of the triangle
The y -coordinate of the vertex at the right angle of the triangle
The probability that A or B or both will occur tomorrow
0.92
$$\frac{2^{27}-2^{24}}{8^{27}-8^{26}}$$
$$2^{-54}$$
$$\frac{6k}{8k}$$
$$\frac{3w}{4w}$$
The standard deviation of the numbers in A after each number in that set has been increased by 3
The standard deviation of the numbers in B after each number in that set has been increased by 2
25000 +道题目
236本备考书籍
