Answer:4.18
Step-by-step explanation:
2.9+2/9
 
        
                    
             
        
        
        
Step-by-step explanation:
Given that,
a)
X ~ Bernoulli  and Y ~ Bernoulli
 and Y ~ Bernoulli 
X + Y = Z
The possible value for Z are Z = 0 when X = 0 and Y = 0 
and Z = 1 when X = 0 and Y = 1 or when X = 1 and Y = 0
If X and Y can not be both equal to 1 , then the probability mass function of the random variable Z takes on the value of 0 for any value of Z other than 0 and 1,
Therefore Z is a Bernoulli random variable
b)
If X and Y can not be both equal to  1
then,
 or
 or 
 and
 and 

c)
If both X = 1 and Y = 1 then Z = 2 
The possible values of the random variable Z are 0, 1 and 2.
since a  Bernoulli variable should be take on only values 0 and 1 the random variable Z does not have Bernoulli distribution
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
A is the answer A is the answer
 
        
             
        
        
        
Answer:
x=3y/4 - 7/4
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
7 hours 
Step-by-step explanation:
47+23=70
1hour = 70 toys
 ? = 490 toys
 Then you cross multiply:
1hour*490 toys= 490/70 = 7 hours 
____________
70 toys