Expressions equivalent can be:
-2(5c)
-2*-5c
=10c
        
             
        
        
        
Answer:
attached below 
Step-by-step explanation:
Attached below is a detailed solution to your problem above 
a) show that the maximum likelihood estimator of Ï2 is Xi and Yi.
attached below is the detailed solution 
 
        
             
        
        
        
My educated guess would be 3 times, since it’s unlikely that you would get it many time because of the low probability. Sorry it incorrect!!
        
                    
             
        
        
        
Answer: 56 people in line are not senior citizens
Step-by-step explanation:
 
        
             
        
        
        
 Your answer is 2,200 pupils.
If 990 is equal to 45% of the total amount of pupils, then to find 1% we can divide both 45 and 990 by 45.
990 ÷ 45 = 22, which is 1%, so then we multiply 22 by 100 to get 100% of the pupils, which gives us 2,200.
I hope this helps!