We're told that



a. We want to find  . By definition of conditional probability,
. By definition of conditional probability,

By the law of total probability,

Then

(the first equality is Bayes' theorem)
b. We want to find  .
.

since  .
.
 
        
             
        
        
        
The formula is A=B*H (A=BxH)
        
             
        
        
        
Answer:
C should be next
Step-by-step explanation:
Ok after you add 3x to both side you should get this:
5=5x+9 
It makes since o subtract 9 from both sides at least for me.
Hope this helps :D
 
        
                    
             
        
        
        
x = one angle
y = other angle
y = 15+x
complements add to 90 degrees
x+y = 90
substitute for y (15+x)
x + 15+x = 90
combine like terms
2x+ 15 = 90
subtract 15 from each side
2x = 75
divide  each side by 2
x = 75/2
x = 37.5
y = x+15
y = 37.5 + 15
y =52.5
The two angles are 37.5 and 52.5