A sock drawer contains seven socks, each one a different solid color. The colors of the socks are red, orange, yellow, green, blue, indigo, and violet. If a person reaches into the drawer and pulls out two socks, how many different color combinations are possible in the selected pair of socks?
Choose the correct option.
A) 12
B) 15
C) 21
D) 36
E) 42
Since here order of socks is not important then we'll have 7C2 i.e. 21 combinations.   If order is important then we would have got 42 socks...   ANS option 21 is correct answer..
<result>C</result>
A sock drawer contains seven socks, each one a different solid color. The colors of the socks are red, orange, yellow, green, blue, indigo, and violet. If a person reaches into the drawer and pulls out two socks, how many different color combinations are possible in the selected pair of socks?