Card 7 / 13: 4. Of the 6 courses offered by the music department at her college, Kay must choose exactly 2 of them. How many different combinations of 2 courses are possible for Kay if there are no restrictions on which 2 courses she can choose?
A)
12
B)
13
C)
14
D)
15
E)
16
Answer:
D) 15
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