There are 1,296 different ways to make supreme choice pizza.
Step-by-step explanation:
Here, the total number of crusts available  = 6
The number of crust to be chosen = 1
So, the number of ways that can be done  = [tex]^6 C_1 = 6[/tex]  ways  ...... (1)
Similarly, the total number of meats available  = 4
The number of types meats to be chosen = 2
So, the number of ways that can be done  = [tex]^4 C_2 = 6[/tex]  ways ...... (2)
Similarly, the total number of vegetables available  = 9
The number of types vegetables to be chosen = 2
So, the number of ways that can be done  = [tex]^9 C_2 = 36[/tex] ways  ...... (3)
Now, combining (1), (2) and (3):
The number of ways one can choose 1 crust, 2 meat and 2 vegetables
= 6 ways x 6 ways x 36 ways  = 1,296 ways
Hence, there are 1,296 different ways to make supreme choice pizza.