Answer:
33
Step-by-step explanation:
45 is half of 90
So straight away go to 45-12
33 
Hope this helps
-GoldenWolfX
 
        
                    
             
        
        
        
Y=3 
to solve this you just substitute 4 in for x into the equation and solve for y. since negative 3 plus 7 is 4, y=4
        
                    
             
        
        
        
Answer:
The answer is B
Step-by-step explanation:
 
        
                    
             
        
        
        
this would be 94 hope it helps
 
        
                    
             
        
        
        
Answer:
a)0.08  , b)0.4  , C) i)0.84  , ii)0.56
Step-by-step explanation:
Given data
P(A) =  professor arrives on time
P(A) = 0.8
P(B) =  Student aarive on time
P(B) = 0.6
According to the question A & B are Independent  
P(A∩B) = P(A) . P(B)
Therefore  
 &
 &  is also independent
 is also independent
 = 1-0.8 = 0.2
 = 1-0.8 = 0.2
 = 1-0.6 = 0.4
 = 1-0.6 = 0.4
part a)
Probability of both student and the professor are late
P(A'∩B') = P(A') . P(B')  (only for independent cases)
= 0.2 x 0.4
= 0.08
Part b)
The probability that the student is late given that the professor is on time
 =
 =  =
 =  = 0.4
 = 0.4
Part c)
Assume the events are not independent
Given Data
P = 0.4
 = 0.4
= = 0.4
 = 0.4

 = 0.4 x P
 = 0.4 x P
= 0.4 x 0.4 = 0.16
 = 0.16
 = 0.16
i)
The probability that at least one of them is on time
 = 1-
 = 1-  
  
=  1 - 0.16 = 0.84
ii)The probability that they are both on time
P = 1 -
 = 1 -  = 1 -
 = 1 - ![[P({A}')+P({B}') - P({A}'\cap {B}')]](https://tex.z-dn.net/?f=%5BP%28%7BA%7D%27%29%2BP%28%7BB%7D%27%29%20-%20P%28%7BA%7D%27%5Ccap%20%7BB%7D%27%29%5D)
= 1 - [0.2+0.4-0.16] = 1-0.44 = 0.56