Answer:
D
Step-by-step explanation:
its the closest to the answer i got so that must be it
  
        
             
        
        
        
Answer:
210.
Step-by-step explanation:
Combination formula is

Then, we have that n = 10 and r=6:


To simplify calculus, we are going to use that n! = (n-1)!n = (n-2)!(n-1)n and so on.





 
        
             
        
        
        
Answer:
9 mins and 8 secs
Step-by-step explanation: