If 5/w + 5/x = 5/y and wx = y, then the average (arithmetic mean) of w and x is	Choose the correct choice from the following choices:
A) 1/2	B) 1	C) 2	D) 4	E) 8
Given: 5/w + 5/x = 5/ywx=y   Find: (w+x)/2 = ?   5(1/w + 1/x) = 5(1/y) - divide both sides by 5   (1/w + 1/x) = 1/y   (x+w)/wx = 1/wx - sub'd in y=wx   x+w - 1 = 0   x+w = 1   Therefore (w+x)/2 = 1/2   1/2ns: 1/2
<result>A</result>
If 5/w + 5/x = 5/y and wx = y, then the average (arithmetic mean) of w and x is