Answer:
The answer is "Option a".
Step-by-step explanation:
In the given scenario, The appropriate test for the teaching profession's accomplishment pre and post-class would be the two-sample t-test with dependent samples, that's why choice "a" is correct.
 
        
             
        
        
        
30 students
14 have no siblings
that leaves 16 with siblings
6 have brothers and 12 have sisters which = 18 so 2 of the students have both a brother and a sister
2/30 students have a brother and a sister
1/15 chance
        
             
        
        
        
Answer:

Step-by-step explanation:
Co-ordinates of point A = ( -7 , 1 )
Co-ordinates of point M = ( -2 , 2 )
Let the co-ordinates of point B be ( x , y )
A ( -7 , 1 )  ( x1 , y1 )
 ( x1 , y1 )
B ( x , y )  ( x2 , y2 )
 ( x2 , y2 )
Now, 
Midpoint = 
⇒
Finding the value of x :                    
⇒
Do cross multiplication                
⇒
⇒
⇒
⇒
Now, finding the value of y
⇒
Do cross multiplication
⇒
⇒
⇒
⇒
Hence, The co-ordinates of point B = ( 3 , 3 )
Hope I helped!
Best regards!
~
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
132+10+2=144