Question

Scott has eight CDs, and he picks two to take to work each day. How many different ways can Scott choose two CDs?

a.)56 B.)28 C.)20,160 D.)112

Answer 1

\[\frac{8\times 7}{2}\]

Answer 2

\( {8 \choose 2} =28\) so, B is correct.

Answer 3

8 choices for first one, then 7 for second one, and since order doesn't matter you divide by 2 because there is no difference between picking first slayer and then britney spears, or first britney spears and then slayer

Answer 4

pop culture reference :O

Answer 5

you divide by 2 because you have overcounted twice as much,