Adam has s pairs of shoes, which is 1/2 as many as Katherine and twice as many as Julie. In terms of s, how many pairs of shoes do the three of them have combined? Pick: A) 7/2*s B) 11s C) 2s D) 5/2*s E) 13/4*
== s +2s + s/2 ==&gt; 3s + 1/2 s = 7/2*s   7/2*sns .7/2*s
<result>A</result>
Adam has s pairs of shoes, which is 1/2 as many as Katherine and twice as many as Julie. In terms of s, how many pairs of shoes do the three of them have combined?