Answer
Total number of ways to order a drink by the customer equals to 40.
Work Step by Step
We know that the situation involves making choices with three groups of items.
We use the fundamental counting principle to find the number of ways to order a drink by the customer. Multiply the number of choices for each of the two groups.
That is,
$2\times 4\times 5=40$
Hence, there are 40 ways to order a drink by the customer.
