If they get unexpected results they could note what they could've done wrong or what they could change in a next trail of experiments. Or look back and see what different happened to they could've hypothesized. There could be many different courses on what to do next.
 
        
             
        
        
        
Answer:
<h3>             10,450</h3>
Step-by-step explanation:
21-13=8   and   29-21=8
So this is aritmetic series where a₁ = 13, and r = 8
Sum of the first n terms:  

 
        
             
        
        
        
A.  (7/13)·(1/3)=7/39.       P=7/39
B.  (6/13)·(2/3)=12/39.    P=12/39
C.  (7/13)·(2/3)=14/39.    P=14/39
D.  (6/13)·(1/3)=6/39.      P=6/39
All the numbers from Bag B were written as thirds cause their probabilities could be simplified to make multiplying easier