Bob is going to China, and he wants to bring some DVDs on the airplane. If Bob has a collection of DVDs, in how many ways can he bring of them?

A.3
B.5
C.455
D.2,730

C.455

To determine the number of ways Bob can bring a collection of DVDs on the airplane, we can use the concept of combinations.

The number of ways to choose k items from a collection of n items, without regard to the order, is given by the formula:
C(n, k) = n! / (k! * (n - k)!)

In this case, Bob has a collection of DVDs, and he wants to bring a certain number of them. Let's say he wants to bring k DVDs.

Using the formula, we can calculate the number of ways Bob can bring k DVDs from his collection.

n = total number of DVDs in Bob's collection
k = number of DVDs Bob wants to bring

In this question, it is not mentioned how many DVDs Bob has in his collection, so we cannot determine n. Therefore, we cannot calculate the exact number of ways Bob can bring his DVDs.

As a result, the given options A, B, C, and D are not sufficient to answer the question.