Step-by-step explanation:
I think is b i hope this works 
 
        
                    
             
        
        
        
<h3>
Answer:  15</h3>
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Work Shown:
d = common difference
p = first term = 24
q = second term = a+d = 24+d
r = third term = q+d = 24+d+d = 24+2d = 6
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Solve for d
24+2d = 6
2d = 6-24
2d = -18
d = -18/2
d = -9
We add -9 to each term to get the next term. This is the same as subtracting 9 from each term to get the next term.
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First term = 24
Second term = 24-9 = 15
Third term = 15-9 = 6
We get the sequence 24, 15, 6
 
        
        
        
Expected is -3
Expect to lose $3… bad game right there!
        
             
        
        
        
Remark
Many calculators have a key that will do this in one step. Mine is one of them. So let's start with the answer and then we'll do it the long way. 
9C3 = 84. You put it into your calculator as 9   2nF   nCr 3 = 
Solution

3*4*7 = 84 which is what you set out to show.
 
        
             
        
        
        
Answer:
B
Step-by-step explanation:
6 oz, 19lb 
1 lb, 20lb
2 oz, 20lb 2oz
6oz+2oz+1lb= 1lb 8oz