Can you check this problem?

Question

Jean has 5 different colors of markers: red, blue, green, orange, and purple. Two colors are used to make a sign. How many different combinations are possible? List them.

Ans: 10 possible combinations
red/blue, red/green, red/orange, red/purple, blue/green, blue/orange, blue/purple, green/orange, green/purple, and purple/orange

Answer 1

Correct, there are 10 of them and you found them all

Answer 2

there are ten of them

Answer 3

15

Answer 4

You are correct 10