题库搜索>问题求解PS-13423
If a certain coin is flipped, the probability that the coin will land heads up is 1/2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
硬币抛5次，问前三次正面朝上 后两次不是的概率是多少 因为每一次都是确定的 所以1/2*1/2*1/2*1/2*1/2=1/32
默默
概率是一样的，概率相乘就是了
0
0
回复
2018-05-17 01:53:01
科目：
问题求解PS
来源：
GWD
题目信息1m5s
平均耗时
90.9%
平均正确率
该题由网友KzZewRg提供
点击上传问题求解PS -17904
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17748
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17543
There are 8 balls in a box. 2 of them are red, 4 of them are white, 2 two of them are blue. If 2 balls are to be simultaneously and randomly selected, what is the probability that they will both be red?
问题求解PS -17536
Select 4 people from 3 boys and 3 girls. What is the probability of two boys and two girls being selected?
问题求解PS -17498
Sixty percent of the members of a study group are women, and 45 percent of those women are lawyers. If one member of the study group is to be selected at random, what is the probability that the member selected is a woman lawyer?
问题求解PS -17904
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17748
The table above shows the number of residents in each of two age groups who support the use of each type of funding for a city initiative. What is the probability that a person randomly selected from among the 250 residents polled is younger than 40, or supports a type of funding that indudes a tax,...
问题求解PS -17543
There are 8 balls in a box. 2 of them are red, 4 of them are white, 2 two of them are blue. If 2 balls are to be simultaneously and randomly selected, what is the probability that they will both be red?
问题求解PS -17536
Select 4 people from 3 boys and 3 girls. What is the probability of two boys and two girls being selected?
问题求解PS -17498
Sixty percent of the members of a study group are women, and 45 percent of those women are lawyers. If one member of the study group is to be selected at random, what is the probability that the member selected is a woman lawyer?
分享
周末、晚班滚动开班 
24+35+35+6课时 
