Question

Jeff has to write a report on two of the seven wonders of the ancient world. How many different combinations can Jeff write?

A : 14
B : 21
C : 28
D : 49

Answer 1

what do you think it is

Answer 2

I kinda think B

Answer 3

The answer is B because if you take each one individually and put it with one it is not with you get 21

Answer 4

it is 7 times 7 so you would get?

Answer 5

49

Answer 6

now I'm confused, is it 21 or 49

Answer 7

it is 21

Answer 8

1-2 1-3 1-4 1-5 1-6 1-7
2-3 2-4 2-5 2-6 2-7
3-4 3-5 3-6 3-7
4-5 4-6 4-7
5-6 5-7
6-7