If 20 liters of chemical X are added to 80 liters of a mixture that is 15% chemical X and 85% chemical Y, then what percentage of the resulting mixture is chemical X?	Choose the most appropriate option:
A) 30 %
B) 32 %
C) 35 %
D) 38 %
E) 40 %

Rationale: "the amount of chemical x in the solution is 20 + 0.15 ( 80 ) = 32 liters . 32 liters / 100 liters = 32 % the answer is b ."
Answer: B