After first operation 1 teaspoon of milk has been removed from milk beaker
and placed in water.
There are (x-y) cc's of milk left in A, x cc's of water and y cc's milk in B
The water and milk in B are in present in the ratio x/y Assuring the mixture
is well mixed then one cc of liquid in B will contain x/(x+y) cc's of water and y/(x+y) cc's milk. Teaspoon
back which contains y cc's liquid will have xy/(x+y) cc's water and (y*y)/(x+y) cc's
milk. Thus the mount of milk in A an end will be at end (x-y)+y2/(x+y)=
x2/(x+y) and the amount of water in A will be xy/(x+y).
Thus the ratio of water to milk in A at will be y/x
The amount of milk left in B will be y-y2/(x+y)=xy(x+y)
The amount pf water left in B will be x-xy/(x+y)=x2/(x+y)
Thus the ratio of milk to water in B will be y/x
Same amount of milk in the water in beaker B as water in the milk in A.