Explanation - based on very simple calculations

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	Final concentration c in vessel A:		c  in g/L
	With 4 steps:	0.754  =  (1 - 1/4)4	=  0.316
	With 10 steps:	0.910  =  (1 - 1/10)10	=  0.349
	With 100 steps:	0.99100  =  (1 - 1/100)100	=  0.366
	With 1000 steps:	(1 - 1/1000)1000	=  0.368
	Use a pocket calculator to check the results.
	With n steps:	(1 - 1/n) n
	For n = 1000 up to infinite:		=  0.368