作业帮离散随机变量和概率分布问题
来源：学生作业帮 编辑：拍题作业网作业帮 分类：英语作业 时间：2024/05/16 02:20:23
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?
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