A box at a yard sale contains 3 different china dinner sets, each

您还没有登录，登录以后才可以查看答疑和进行提问。

试题详情

A box at a yard sale contains 3 different china dinner sets, each consisting of 5 plates. A customer will randomly select 2 plates to check for defects. What is the probability that the 2 plates selected will be from the same dinner set?

答案：A

专业教师答疑

最新

提问

2
评分

2
浏览

Problem Solving

老师这个总的可能数15*14/2！我知道，但为啥分子不是15*4呢（第一个可以选15中任意一个，但第二个只能选那一套里面其余4个了）

6
评分

6
浏览

Problem Solving

请老师讲一下

问个问题

答疑小程序

最热提问

Reading Comprehension
The passage suggests which of the following?......
Reading Comprehension
The passage suggests that if telomere buffers did ......
Sentence Equivalence
Although field studies have linked inbreeding to d......
Text Completion
Because we assume the (i)_____ of natural design, ......
Text Completion
Human nature and long distances have made exceedin......
Reading Comprehension
The passage is primarily concerned with......
Reading Comprehension
It can be inferred from the passage that the use o......
Problem Solving
A bush will be dug up and then planted again at a......

试题详情

专业教师答疑 最新 提问

问个问题

答疑小程序

最热提问

专业教师答疑

最新

提问