GRE Probability

In this module, you'll learn all of the concepts, techniques and strategies needed to answer probability questions on the GRE. In particular, this module covers:

  • Finding probabilities by counting
  • Complements
  • “At least” & “at most” questions
  • “Or” probabilities
  • “And” probabilities
  • Mutually exclusive events
  • Independent events

 

GRE PROBABILITY VIDEOS

  • 1. Lesson: Introduction to Probability (6:42)
  • 2. Question: Odd or Even (1:30)
  • 3. Question: Sum of 11 (2:35)
  • 4. Lesson: The Complement (6:06)
  • 5. Question: At Least 1 Even Number (3:39)
  • 6. Lesson: Mutually Exclusive Events (3:21)
  • 7. Lesson: Probability of Event A OR Event B (4:54)
  • 8. Lesson: Applying the OR Rule (2:17)
  • 9. Question: Green or Ball (2:13)
  • 10. Question: Odd or Prime (2:12)
  • 11. Lesson: Probability of Event A AND Event B (3:16)
  • 12. Question: 2nd Ball is Yellow (2:35)
  • 13. Question: Events Q and R (1:28)
  • 14. Lesson: Independent Events (6:25)
  • 15. Lesson: Determining Independence (3:52)
  • 16. Lesson: Rewriting Questions (5:33)
  • 17. Question: Total Number of Balls (2:47)
  • 18. Lesson: Listing vs Counting vs Probability Rules (7:40)
  • 19. Lesson: General Probability Strategies (2:03)
  • 20. Lesson: Guessing Strategies (5:31)
  • 21. Question: Draw a Red Chip (1:42)
  • 22. Question: Target (2:04)
  • 23. Question: 4-Digit Number (3:39)
  • 24. Question: Same Color (3:02)
  • 25. Question: 2 heads (4:02)
Total viewing time for the GRE Probability module: 91 minutes.

Practice from the Official Guide

Practice the skills and GRE-specific strategies you learned in this module by answering the following questions from the Official Guide to the GRE (3rd edition):

  • 125(5), 162(10), 321(11-14), 322(150)

 

Here are the related questions in the Official Guide to the GRE (1st or 2nd edition):

  • 120(5), 152(10), 297(11-13), 298(14-15) 

 

Note: The above practice questions are listed in the form page#(question#). So, for example, 120(5) represents question #5 on page 120.

Change Playback Speed

You have the option of watching the videos at various speeds (25% faster, 50% faster, etc). To change the playback speed, click the settings icon on the right side of the video status bar.

QC Strategies

When you encounter a Quantitative Comparison question, be sure to consider which strategy might best apply: 

 

Quantitative Comparison Module

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