Probability GRE Practice Questions

This lesson is part of a series of practice test questions for the quantitative reasoning section of the GRE revised General Test.

These are the directions for the Quantitative Comparison Questions.

Directions: Compare Quantity A and Quantity B, using additional information centered above the two quantities if such information is given, and select one of the following four answer choices:
(A) Quantity A is greater.
(B) Quantity B is greater.
(C) The two quantities are equal.
(D) The relationship cannot be determined from the information given.

Example 1:
Car X can come with any of these 5 additional features: sunroof, stereo, tinted windows, leather seats and cruise control.
Quantity A: Number of different combinations possible
Quantity B: 25 Example 2:
Events A and B are independent.
The probability that events A and B both occur is 0.6
Quantity A: The probability that event A occurs
Quantity B: 0.3 Example 3:
Quantity A: Number of different triangles possible using the given points as vertices.
Quantity B: 42 Example 4:
A box contains only yellow, blue and red balls. 3/11 of the balls are red, and 3/4 of he remaining balls are blue. A ball is randomly selected from the box.
Quantity A: Probability that the ball is blue
Quantity B: Probability that the ball is red or yellow.