If xy > 0, 1/x + 1/y = 15, and 1/xy = 5, then (x+y)/5 = ?  Choose the correct choice from the following options.
A) 1/25	B) 1/6	C) 3/5	D) 5	E) 6
(1/X+1/Y)=15 canbe solved as {(x+y)/xy}=5. Substituting for 1/xy=5, we get   x+y=15/5   ==&gt; (x+y)/5= 15/(5*5)=3/5.   3/5
<result>C</result>
If xy > 0, 1/x + 1/y = 15, and 1/xy = 5, then (x+y)/5 = ?