如果是跟统计软体有关请重发文章 如果跟论文有关也烦请您重发文章 文章类别是为了帮助大家搜寻资料与解答，造成不便之处请见谅 Max Sandlin is exploring the characteristics of stock market investors. He found that 60% of all investors have a net worth exceeding $1,000,000; 20% of all investors use an online brokerage; and 10% of all investors have a net worth exceeding $1,000,000 and use and online brokerage. An investor is selected randomly, and E is the event "networth exceeds $1,000,000," and O is the event "uses and online brokerage." Which of the following is true? A) E and O are collectively exhaustive B) E and O are dependent C) E and O are mutually exclusive D) E and O are independent 我不懂整个英文的叙述? --

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