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And
Intersections

 

 Lets talk about some stuff from the last chapter.

 
 When you flip a coin,
 the chance of getting a heads is ...
 

 50% also known as .50, also known as

 

 When you flip a coin two times,

 the chance of getting two heads is ...
 

25% also known as .25, also known as

 
 When you flip a coin three times,
 the chance of all three being heads is ...
 

12.5% also known as .125, also known as

 
 There is a pattern here.
 See it?
 
 The chance of getting a heads on the first flip is ...
 

 

 
 The chance of getting a heads on the first flip
 AND the second flip is ...
 

 
 The chance of getting a heads on the first flip
 AND the second flip, AND the third flip is ... 
 

 

 

 The deal is, 
 when we connect the chance of independent events happening 
 with the word AND
 we multiply together the chance of each one happening.
 

   copyright 2005 Bruce Kirkpatrick

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