Home
Math by Grades Pre-K
Kindergarten
Grade 1
Grade 2
Grade 3
Grade 4
Grade 5
Grade 6
Grades 7 and 8
Grades 9 and 10
Grades 11 and 12
Math by Topics Arithmetic
Algebra
Geometry
Math Word Problems
Trigonometry
Statistics
Probability
PreCalculus
Calculus
Set Theory
Matrices
Vectors
Math Worksheets Math Worksheets
Interactive Zone
Math in Video Lessons Basic Algebra
Intermediate Algebra
College Algebra
High School Geometry
College Calculus
Linear Algebra
Engineering Math
Singapore Math
Math for Specific Tests SAT Math
ACT Math
GMAT Math
High School, Regents
California Standards
GCSE Maths
A Level Maths
Math Fun and Games Math Trivia
Math Games
Fun Games
Mousehunt Guide
Exam Preparation SAT Preparation
ACT Preparation
GMAT Preparation
Science Biology
Chemistry
Science Projects
High School Biology
High School Chemistry
High School Physics
GCSE Biology
Others English Help
ESL, IELTS, TOEFL
Programming
Animal Facts
Tutoring Services
What's New

 

INDEPENDENT EVENTS

 

 

Events are independent if the outcome of one event does not affect the outcome of another. For example, if you throw a die and a coin, the number on the die does not affect whether the result you get on the coin.

If A and B are independent events, then the probability of A happening AND the probability of B happening is P(A) × P(B).

P(A and B) = P(A) × P(B)

 

 

Example:

If a dice is thrown twice, find the probability of getting two 5’s.

Solution:

 

 

Example:

Two sets of cards with a letter on each card as follows are placed into separate bags.


Sara randomly picked one card from each bag. Find the probability that:

a) She picked the letters ‘J’ and ‘R’.

b) Both letters are ‘L’.

c) Both letters are vowels.

Solution:

a) Probability that she picked J and R =

b) Probability that both letters are L =

c) Probability that both letters are vowels =

 

Example:

Two fair dice, one coloured white and one coloured red, are thrown. Find the probability that:

a) the score on the red die is 2 and white die is 5.

b) the score on the white die is 1 and red die is even.

Solution:

a) Probability the red die shows 2 and white die 5 =

b) Probability the white die shows 1 and red die shows an even number =

 

 

The following videos give more examples of calculating the Probability of Independent Events.

 

 

 

Custom Search

 

We welcome your feedback, comments and questions about this site - please submit your feedback via our Feedback page.

 

© Copyright 2005, 2008 - onlinemathlearning.com
Embedded content, if any, are copyrights of their respective owners.


 

 

Custom Search