Two bowls are taken, one contains water and another contains tea.one spoon of water is added to second bowl and mixed well, and a spoon of mixture is taken from second bowl and added to the second bowl. Which statement will hold good for the above?

Suppose the bowls contain s spoons of water (w) and tea (t). After the first transfer, the tea bowl contents are
  st+w
After the second transfer, the water bowl contains
  (s-1)w + (s*t+ w)/(s+1)
  = (s/(s+1))(s*w+ t)
After the second transfer, the tea bowl contains
  (s/(s+1))(s*t+ w)

The proportion of each liquid in the other bowl is the same.