GRE
x
3
The discarded number
50
n
k
The average donation for all the alumni
450
c
13
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
The median of 2, 5, 7, 10, x, x+4
The median of 1, 2, 3, 5, 6, 7, 8, 9
25000 +道题目
252本备考书籍