# Summary: Probability Theory

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## Read the summary and the most important questions on Probability Theory

• ### 1 Introduction

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n1 * n2 ways
• #### What is a permutation?

N different elements : order does matter: n!

n!/(n-r)!

(n-1)!

NCR

N!/n1!..nk!

nC(r1,r2,rk)
• #### How many options for distributing r indistinguishable objects among n cells, atleast a per cell

(r-an+n-1)C(n-1)
• ### 2 Probability

This is a preview. There are 12 more flashcards available for chapter 2

• #### What is a sample space, event, and element?

Sample space: all possible outcomes
Element: outcome in sample space
Event: subset in sample space
• #### State the  De Morgan laws

1. (A ∩ B)' = A' U B'
2. (A U B)' = A' ∩ B'
PLEASE KNOW!!! There are just 59 flashcards and notes available for this material. This summary might not be complete. Please search similar or other summaries.