Pharmacist

Pharmacist had a 12 l vessel herbal lotion, which contained 30% active ingredient. Her assistant poured 18 liters of herbal lotion containing 45% of the active ingredient into a container. What percentage of herbal lotion was produced?

Correct result:

p =  39 %

Solution:

V1=12 l p1=30%=30100=0.3  V2=18 l p2=45%=45100=0.45  p=100 p1 V1+p2 V2V1+V2=100 0.3 12+0.45 1812+18=39%



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