Country L used to import wheat from Country S because Country S's price per bale was the cheapest available. When Country S raised its price by 25 percent, however. Country L decided to transfer its business to Country D. which now boasted the best deal available.
Which of the following, if true, would be best supported by the assertions above?
Student: The majority of the 50 students in our class answered at least 80% of the questions correctly on last year’s Algebra I final exam. If these final exam scores do accurately measure a student’s level of understanding, Marc must have learned less about algebra last year than most other students in our class, because he answered only 75% of the questions correctly on last year’s Algebra I final exam.
Which of the following, if true, most seriously weakens the student’s argument?
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Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.
Which of the following, if true, most helps to explain the disproportionate increase in customer complaints?
Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood.
Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?
Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.
Sharon: But a normal, moderate level of unemployment is 5 percent, with 1 out of 20 workers unemployed. So at any given time if a person knows approximately 50 workers, 1 or more will very likely be unemployed.
Sharon's argument relies on the assumption that
Motorcycle-safety courses, offered by a number of organizations, teach motorcyclists important techniques for handling and for safely sharing the road with other road users. If more motorcyclists took these courses, there would be fewer serious motorcycle accidents. Data show that 92% of the motorcyclists who are involved in a serious motorcycle accident have never taken a motorcycle-safety course.
In assessing whether the data cited provided support for the position taken about motorcyclists' taking the courses, it would be most useful to determine which of the following?
Last year all refuse collected by Shelbyville city services was incinerated. This incineration generated a large quantity of residual ash. In order to reduce the amount of residual ash Shelbyville generates this year to half of last year's total, the city has revamped its collection program. This year city services will separate for recycling enough refuse to reduce the number of truckloads of refuse to be incinerated to half of last year's number.
Which of the following is required for the revamped collection program to achieve its aim?
Corporate Officer: Last year was an unusually poor one for our chemical division, which has traditionally contributed about 60 percent of the corporation's profits. It is therefore encouraging that there is the following evidence that the pharmaceutical division is growing stronger: it contributed 45 percent of the corporation's profits, up from 20 percent the previous year.
On the basis of the facts stated, which of the following is the best critique of the evidence presented above?
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