Question

You are required to choose two topics from a list of five to write about on your science test. How many different pairings are possible?

Answer 1

5^2 = 25 pairings

Answer 2

The answers that were given to me are this:
10
20
30
60

When I did it I also got 25.

Answer 3

its C(5,2) =5*4/2=10

Answer 4

Now that makes sense! Ty