A coffee shop serves 12 different kinds of coffee drinks. How many ways can 4 different coffee drinks be selected?

Step 1:

Since we see that there is no significance to ordering these drinks we are using combinations

Step 2:

Now we calculate

$${}_{12}{C}_4=\frac{{}_{12}{P}_4}{4!}=\frac{12\cdot 11\cdot 10\cdot 9}{4\cdot 3\cdot 2\cdot 1}=495$$