If 3/w + 3/x = 3/y and wx = y, then the average (arithmetic mean) of w and x is	Choose the correct choice from the following.
A) 1/2 B) 1 C) 2 D) 4 E) 8
Given: 3/w + 3/x = 3/ywx=y   Find: (w+x)/2 = ?   3(1/w + 1/x) = 3(1/y) - divide both sides by 3   (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
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If 3/w + 3/x = 3/y and wx = y, then the average (arithmetic mean) of w and x is