There are 7 pairs of socks and 2 socks are worn from that such that the pair of socks worn are not of the same pair. what is the number of pair that can be formed.  Choices:	A) 40	B) 49	C) 41	D) 56	E) 42
First of all you should remember that there is a difference in left and right sock.   now no. of way to select any of the sock = 7   and for second = 6   so total methods = 7*6= 
<gadget id="calculator">7*6</gadget>
<output>42</output>
42   ANSW42R:42
<result>E</result>
There are 7 pairs of socks and 2 socks are worn from that such that the pair of socks worn are not of the same pair. what is the number of pair that can be formed.