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   GRE Permutation Guide
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spacer left_arrow Ch 1: Permutation Introduction
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spacer left_arrow Ch 2: Problem Variations
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   GRE Combination Guide
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spacer left_arrow Ch 1: What is a Combination?
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spacer left_arrow Ch 2: Permutation / Combination?
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spacer left_arrow Ch 3: Groups/Pairings
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   GRE Probability Guide
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spacer left_arrow Ch 1: Simple Probability
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spacer left_arrow Ch 2: Multiple Events
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spacer left_arrow Ch 3: Independent Events
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spacer left_arrow Ch 4: Working Backwards
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spacer active_arrow Ch 5: A Different Method
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spacer left_arrow Ch 6: Extra Questions
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Chapter 5: A Different Method (Advanced)
 
 

NOTE: Please read this section after you have mastered the previous four sections.


Example 17
What is the probability that rolling two identical dice together will result in a 3 and a 4?



Answer: Think Bottom to Top

Bottom: We have two dice being rolled, with 36 total outcomes possible.
Top: There are two outcomes that can happen: (3,4) and (4,3).
Probability: 2/36 = 1/18

 

Example 18
What is the probability that rolling two identical dice together will result in the sum of the dice adding to 7?

 


This is a partial free sample of our prep guide. To view the remainder of this page, purchase the 800score.com Prep Course.

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 Chapter 6: Extra Questions