GRE Exam Dumps : GRE General Test

Exhibit.

A group of 3 different investors is to be randomly selected from the 5 investors shown. What is the probability that, for at least 2 of the 3 investors selected, the number of shares of Stock X purchased and then sold will be less than 1.5 times the corresponding number for stock Y?

A)

B)

C)

D)

E)

As originally formulated, the selfish-herd theory of prey species aggregation assumed that predatory attacks were equally likely to be launched from any position within the environment. In some circumstances (e.g.. avian predators attacking prey from above), such an approach is appropriate. However, as James et at. argue, in many predator-prey associations, attacks are unlikely to occur from positions within the group. For example, it is likely that an ambushing predator waiting in the path of a group would be detected before the group moves over its position. Hence, in many ecological situations, predatory attacks on grouped prey will occur exclusively from outside the group. In such circumstances, there is a strong premium to a group member in being in the interior of the group.

The passage suggests that compared to members of the prey groups in "some circumstances." certain members of the prey groups in "many ecological situations" are likely to be less

A rancher is planning to build an enclosed pen for horses on level ground. The pen will be rectangular with a length that is 2 times the width. If the perimeter of the pen will be P meters, which of the following represents the area, in square meters, of the pen in terms of P ?

A)

B)

C)

D)

E