In a recent survey of local businessmen and business-women, 40% of the respondents said they were online subscribers to Businessweek magazine, 70% said they were online subscribers to the Wall Street Journal (WSJ ). 30% said that they subscribed to both. What percentage of the respondents subscribe to,a. At least one of the publications?,b. Neither publication?,c. WSJ but not Businessweek,d. If a respondent is selected at random, and it turns out that that person subscribes to the WSJ , how likely is it that the person also subscribes to Businessweek?,e. Are the events “subscribes to the WSJ ” and “subscribes to Businessweek ” statistically independent?,f. Are the events “subscribes to the WSJ ” and “subscribes to Businessweek ” mutually exclusive?

 

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