Answer:
36
Step-by-step explanation:
This questions tests for the fundamentals of counting.
Let's say event [tex]x_i[/tex] can be done in X ways and event [tex]y_i[/tex] can be done in Y ways, therefore the total number of ways [tex]x_i[/tex] and [tex]y_i[/tex] can be done is given as [tex]xy[/tex].
Applying this counting principle in our case, the total different sandwiches is obtained as the product of the individual sandwich types.
[tex]Total=s\times m\times b\\=3\times 4 \times 3\\=36[/tex]
36 different sandwiches can be made.
