The answer is B because the quantity tends to stay the same as the sample goes up
        
             
        
        
        
Answer:
0.6804
Step-by-step explanation:
Given that Margie is practicing for an upcoming tennis tournament. Her first serve is good 20 out of 30 times on average. 
Since each trial is independent and there are two outcomes, X no of good serves is binomial with n=6 and p =2/3
Required probability
= Prob that atleast four of 6 times good serve
=
=
Formula used:
P(X=r) =
 
        
                    
             
        
        
        
Answer:
<h2>D) - 9/7</h2>
Hope this will help you lot.
 
        
                    
             
        
        
        
Multiplying a side by a side by a side.(it's the same as a cuboid, but because all the side have the same length, you can simply cube a side to get the answer)