Answer:
                 
Step-by-step explanation:
6 symbols and 4-symbol code so number of combinations wich doesn't contain the same symbol twice would be:
6•5•4•3 = 360
If code starts with a star followed by triangle that means only one posibility for first two symbols and code doesn't containing the same symbol twice means that left 4 symbols for next two.
So number of combinations of code starting with a star followed by triangle and doesn't containing the same symbol twice will be:
1•1•4•3 = 12
The probability that a randomly chosen code starts with a star followed by triangle and doesn't contain the same symbol twice:

 
        
             
        
        
        
WT is white T shirts
BT is blue T shirts, and WT=3BT
 WT+BT=48
 3BT+BT=48
 4BT=48
 BT=12 so WT =3×12=36
 
        
             
        
        
        
False. 800 does not equal 6400
        
                    
             
        
        
        
Answer:
(6, -3)
Step-by-step explanation: