离散随机变量和概率分布问题
来源:学生作业帮 编辑:百度作业网作业帮 分类:英语作业 时间:2024/08/08 14:02:05
离散随机变量和概率分布问题
In a Certain country,40% of registered voters are Democrats,35% are Republicans,and 25% are independents.60% of the Democrats,80% of the Republicans,and 30% of the independents favor increased spending to combat terrorism.If a person chosen at random from this country favors increased spending to combat terrorism,what is the probability that the person is a Democrat?
在某个国家,40%的登记选民是民主党人,35%是共和党人,25%是独立的.民主党的60%,80%的共和党人和30%的独立,赞成增加开支,以打击恐怖主义.如果随意选择一个人从这个国家有利于增加开支,以打击恐怖主义,该人是民主党的概率是什么?
In a Certain country,40% of registered voters are Democrats,35% are Republicans,and 25% are independents.60% of the Democrats,80% of the Republicans,and 30% of the independents favor increased spending to combat terrorism.If a person chosen at random from this country favors increased spending to combat terrorism,what is the probability that the person is a Democrat?
在某个国家,40%的登记选民是民主党人,35%是共和党人,25%是独立的.民主党的60%,80%的共和党人和30%的独立,赞成增加开支,以打击恐怖主义.如果随意选择一个人从这个国家有利于增加开支,以打击恐怖主义,该人是民主党的概率是什么?
![离散随机变量和概率分布问题](/uploads/image/z/5426533-37-3.jpg?t=%E7%A6%BB%E6%95%A3%E9%9A%8F%E6%9C%BA%E5%8F%98%E9%87%8F%E5%92%8C%E6%A6%82%E7%8E%87%E5%88%86%E5%B8%83%E9%97%AE%E9%A2%98)
p1=0.4*0.6=0.24
p2=0.35*0.8=0.28
p3=0.25*0.25=0.0625
p1/(p1+p2+p3)=0.24/0.5825=0.41201716738197
p2=0.35*0.8=0.28
p3=0.25*0.25=0.0625
p1/(p1+p2+p3)=0.24/0.5825=0.41201716738197