The answer is 5/6 because 1/2 a chance to get a blue and 1/3 green so you add that together to get 5/6.
        
             
        
        
        
Answer:
$21
Step-by-step explanation:
starting money: 51
cost of each book = 3
total books bought = 10
3*10 = $30 spent on books
51-30 = $21 left
 
        
                    
             
        
        
        
Exact form = 7/3
Decimal = 2.3
Mixed number Form = 2 1/3