Answer:
The variance of these investment returns is 74
Step-by-step explanation:
Given: 
Series =  10, 30, 15, 5, 20
To Find:
 variance of a series = ?
Solution:
The variance of the series = 



Now  
 
= 
= 36  + 196 +121 +  1+ 16
=  370
Now
 =  74
 =  74
 
        
                    
             
        
        
        
317 is the answer you are looking for.
        
                    
             
        
        
        
Answer:
1.325 x 10 -2
Step-by-step explanation:
That is the answer and I know 100% that it is correct 
 
        
             
        
        
        
 Expression: -4 * 3 1/4
Equation: -4 * 3 1/4 = -13.
 
        
                    
             
        
        
        
21 po nag calculator lang ako