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?