GRE
The range of set T
n
The standard deviation of the numbers 45, 64, 83, and 53
The standard deviation of the numbers 55, 81, 47, and 62
$$C_{12}$$
($$49^{7}$$)$$C_{26}$$
The sum of the terms in the sequence
51
20!+19!+18!
400(18!)
25000 +道题目
269本备考书籍