
                  1) The area of circle O is 81 .
.
                  2)	The length of AB is 6.
      This question deals with two different types of content 
        - probability and geometry. To answer it, we must figure out whether we 
        can determine a probability relationship, so let's start there. 
  
              
                   We want to know the probability that a certain 
      line segment is equal to or less than a certain length. Well, to find any 
      probability, we need to know the total number of possible outcomes and the 
      number of desired outcomes (these being the number of ways to get the specific 
      result we want). In this case, the number of desired outcomes will be all 
      lengths of AC less than or equal to  . The number of possible outcomes will be all possible 
      lengths of AC. So basically we’re trying to figure out what fraction 
      of all possible lengths of AC are less than or equal to
. The number of possible outcomes will be all possible 
      lengths of AC. So basically we’re trying to figure out what fraction 
      of all possible lengths of AC are less than or equal to  . But what does the length of AC 
      depend on? If AC had a fixed length, this question would make no 
      sense, since the probability of its being less than or equal to
. But what does the length of AC 
      depend on? If AC had a fixed length, this question would make no 
      sense, since the probability of its being less than or equal to  would have to be either 100% or 0%. So the length of AC must depend 
      on some other part of the diagram. But what? Now it’s time to look at the 
      geometry.
 
      would have to be either 100% or 0%. So the length of AC must depend 
      on some other part of the diagram. But what? Now it’s time to look at the 
      geometry.
       
        
         Countinue 
   
    
        Next to display next topic in the chapter.
    
    
Test Prep Lessons With Video Lessons and Explained MCQ