If the E(X) = 1 then that means it has a 100% which is incorrect. 
Each
block has an equal probability to contain the error so 1/3 because you
choose 2/6.
        
             
        
        
        
Answer:
70 hours. 
Step-by-step explanation:
you need to subtract 450 from 75 which tells you you need 350 more dollars then you need to do 5x70 which gives you 350. 
 
        
             
        
        
        
Answer:
0
Step-by-step explanation:
0 because he grew 22 but the rabbit ate 25 which does not make sense
 
        
                    
             
        
        
        
Let 

. Then 

. By convention, every non-zero integer 

 divides 0, so 

.
Suppose this relation holds for 

, i.e. 

. We then hope to show it must also hold for 

.
You have

We assumed that 

, and it's clear that 

 because 

 is a multiple of 3. This means the remainder upon divides 

 must be 0, and therefore the relation holds for 

. This proves the statement.