GRE
®
托福
®
雅思
GRE
®
提分活动
公开课
首页
文字推理
数学推理
分析写作
登录
注册
返回
小站备考
GRE
GRE数学
GRE数学真题
Joan is allowed to invite 3 of her friends to join her on a family camping trip....
Question 4
Selected one answer choice
收藏
笔记
反馈
我的笔记
5000
保存
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Joan is allowed to invite 3 of her friends to join her on a family camping trip. If Joan has 10 friends, in how many ways can she invite 3 of them?
A.27
B.120
C.240
D.360
E.720
我的答案：
登录查看答案
