Jim has 8 cds that he is going to give away. he lets his best friend choose 2 of the 8 cds. how many different groups of 2 cds are possible?

27

Step-by-step explanation:

1 with 2,3,4,5,6,7,8=7 pairs

2 with 3,4,5,6,7,8=6 pairs

3 with 4,5,6,7,8=5 pairs

4 with 5,6,7,8=4 pairs

5 with 6,7,8=3 pairs

6 with 7,8=2 pairs

7,8=1 pair

Add them to get 27

step-by-step explanation:

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unless if u could do my questions, if not i wouldn't want to