GMAT Practice Questions

The average (arithmetic mean) of the 5 numbers in set *is greater than the median of the 5 numbers in set X, and the average of the 7 numbers in set Yis greater than the median of the 7 numbers In set Y. If the two sets have no numbers in common and If they are combined to form set Z, Is the average of the 12 numbers In set /greater than Hie median of the 12 numbers in set Z?

(1) The average of the numbers in set Kis greater than the average of the numbers in set X.

(2) The median of the numbers in set Y\s greater than the median of the numbers in set X,

Incumbents in the United States House of Representatives who spend large amounts of money on a reelection campaign usually lose, whereas those who spend relatively little money usually win. Thus, heavy campaign spending is detrimental to an incumbent's reelection campaign.

Which of the following, if true, most seriously weakens the argument above?

The passage Is primarily concerned with which of the following?

Despite the fact that the seeds of certain tropical trees fall mostly around the parent tree, the seeds that land farther from the parent trees of these species have the greatest chance of germinating. One hypothesis is that the effect is caused by rodents eating a larger number of seeds beside the parent tree than seeds in places farther away, but studies have shown that this is not so.

Which of the following, If true, would most help explain the effect described above?

The reasoning in the final paragraph most strongly implies that the author makes which of the folowing assumptions?

A major manufacturer of outdoor clothing spends a significant portion of its overhead costs on transportation in its home markets. Everywhere the cost of fuels, including marine and aviation fuels, has been rising steeply for the last six months. But during this period the profits of the company have tripled.

Which of the following would, if true, most help explain why the phenomenon described above occurred?

In criticizing the "second approach" to explaining the supposed lack o* rational transformation of the workplace, the author most likely assumes which of the Wowing?

Because of the positive correlation across animal species between body size and home range size, researchers suspected that body size of female mallards (a species of duck) may influence their home range size. The researchers also reasoned that younger females may be forced into less suitable habitats by older females competing with them for optimal areas, with the younger females compensating by having larger home ranges. However, their research supported neither suspicion. The failure to detect variation of range size according to body size may be due to other, undetermined mallard attributes (for example, body condition) that may have been a significant factor affecting home range size. The fact that most yearling females can breed may help to explain why the expected age effect was not confirmed, since home range size may be affected by breeding capability.

The researchers did find, however, that home range size of females was Inversely related to the percentage of the study area composed of seasonal or semipermanent wetlands. This may have been because of reduced competition for breeding space within the species when more of the wetlands were present. They also found home range size to decrease somewhat as the percentage of wood-shrub habitat increased, suggesting that reduction in visual contact among mallard pairs may reduce interaction and thus reduce competition among breeding pairs.

Regarding female mallards, which of the following was a finding of the researchers' study described in the passage?

Anouk worked In the sates department at MMC Cellular Phones from January through December. The graph shows Anouks sales volume from March through My. For each of the 4 months, February through May, Anouk's sales increased by a constant number of eel phones over the previous month.