一道统计问题(英文)According to a survey of American households,the probability that the residents own 2 cars if annual household income is over $25,000 is 80%.Of the households surveyed,60% had incomes over $25,000 and 70% had 2 cars.The
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![一道统计问题(英文)According to a survey of American households,the probability that the residents own 2 cars if annual household income is over $25,000 is 80%.Of the households surveyed,60% had incomes over $25,000 and 70% had 2 cars.The](/uploads/image/z/13168940-68-0.jpg?t=%E4%B8%80%E9%81%93%E7%BB%9F%E8%AE%A1%E9%97%AE%E9%A2%98%EF%BC%88%E8%8B%B1%E6%96%87%EF%BC%89According+to+a+survey+of+American+households%2Cthe+probability+that+the+residents+own+2+cars+if+annual+household+income+is+over+%2425%2C000+is+80%25.Of+the+households+surveyed%2C60%25+had+incomes+over+%2425%2C000+and+70%25+had+2+cars.The)
一道统计问题(英文)According to a survey of American households,the probability that the residents own 2 cars if annual household income is over $25,000 is 80%.Of the households surveyed,60% had incomes over $25,000 and 70% had 2 cars.The
一道统计问题(英文)
According to a survey of American households,the probability that the residents own 2 cars if annual household income is over $25,000 is 80%.Of the households surveyed,60% had incomes over $25,000 and 70% had 2 cars.The probability that theresidents of a household do not own 2 cars and have an income over $25,000 a year is_______.
一道统计问题(英文)According to a survey of American households,the probability that the residents own 2 cars if annual household income is over $25,000 is 80%.Of the households surveyed,60% had incomes over $25,000 and 70% had 2 cars.The
因为60%的收入超过25,000,而收入超过25,000的人中有80%的人拥有2辆车,所以60% x 80% = 48%的人满足条件收入超过25,000并且有2辆车.那么收入超过25,000但没有车的人就是60% - 48% = 12%的人
60%*(100% - 80%)=12%