A sock drawer contains seven socks, each one a different solid color. The colors of the socks are white,black, red, orange, yellow, green, blue, indigo, and violet. A person reaches into the drawer, pulls out two socks, and puts a single sock on each foot. If each sock can fit either the left or the right foot, and if it matters whether a particular sock is on the left or the right foot, how many different sock fashion combinations could the person make from the nine socks?  Pick one.
A) 12 B) 15 C) 21 D) 36 E) 72
It's a question of permutation since order matters here ....   It can be deduced to-   9P2 = 9!/7! = 9*8= 
<gadget id="calculator">9*8</gadget>
<output>72</output>
72 .........Answer is - 72
<result>E</result>
A sock drawer contains seven socks, each one a different solid color. The colors of the socks are white,black, red, orange, yellow, green, blue, indigo, and violet. A person reaches into the drawer, pulls out two socks, and puts a single sock on each foot. If each sock can fit either the left or the right foot, and if it matters whether a particular sock is on the left or the right foot, how many different sock fashion combinations could the person make from the nine socks?