Question

While attending a film festival you decide that there are 13 movies that you are interested in seeing. However, you only have time to see 7 movies. In how many different ways can you watch 7 of the 13 movies?

Answer 1

8,648,640 is correct.

Explanation:

Answer 2

A. 8,648,640
B. 13
C. 665,280
D. 4,324,320
Assume you don't watch movies twice.
If you have 13 movies to pick from, then you have 13 choices for the first movie. Then, only 12 choices are left. Do this until only 6 are left (13-7=6)
This equates to
`13*12*11*10*9*8*7=8,648,640`
Therefore, the answer is A, 8,648,640 different ways.

Hope this helps!