Finding of a survey of Systems magazine subscribers: Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.Finding of a survey of advertisers in Systems magazine: Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.
For both of the findings to be accurate, which of the following must be true?
【选项】Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
For both of the findings to be accurate, which of the following must be true?
【选项】Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
