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题库 / GMATLA-CR-3
Smithtown University's fund-raisers succeeded in getting donations from 80 percent of the potential donors they contacted. This success rate, exceptionally high for university fund-raisers, does not indicate that they were doing a good job. On the contrary, since the people most likely to donate are those who have donated in the past, good fund-raisers constantly try less-likely prospects in an effort to expand the donor base. The high success rate shows insufficient canvassing effort.
Which of the following, if true, provides more support for the argument?
Smithtown University's fund-raisers were successful in their contacts with potential donors who had never given before about as frequently as were fund-raisers for other universities in their contacts with such people.
This year the average size of the donations to Smithtown University from new donors when the university's fund-raisers had contacted was larger than the average size of donations from donors who had given to the university before.
This year most of the donations that came to Smithtown University from people who had previously donated to it were made without the university's fund-raisers having made any contact with the donors.
The majority of the donations that fund-raisers succeeded in getting for Smithtown University this year were from donors who had never given to the university before.
More than half of the money raised by Smithtown University's fund-raisers came from donors who had never previously donated to the university.
果因推理：
P:（果）异常高的成功率
C: (因）因为联系的新人少，老人多，不努力——排除他因
要补全的Gap（假设）：正常情况下，如果大家的成功率一样的话，联系的新人多（即努力的募捐者），成功率不可能这么高
例子：小明考gmat，正确率90%，正常情况下学生做新题 不可能有这么高的正确率，说明他做的新题少 重复做老题多。因为，而只做老题，不做新题的，不是好学生—所以，小明不是好学生
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