Would you please show me how to arrive at this answer? I thought I was getting a handle on alligations, but this one throws me because I do not see enough information to fill in the-tic-tac-toe grid as far as my understanding of it is.
You have been asked by the Pharmacist to prepare 3 liters of a 30% strength solution. Your pharmacy stocks the active ingredient in 8 oz bottles of 70% strength. How many bottles of the active ingredient will you need to open to complete this request? A 14 B 10 C 6 E 3
Thank you so much
Reply (Keith): Hi Judy, Indeed, this question was written (on purpose) in a way which throws many people off. However, I wrote it that way because I feel that it helps people to better develop test taking muscles. After reading the question, you are probably asking: "but what are we mixing it with?"
So, when you aren't given another(lower)strength to mix with, then you must default to using Water or NS or something with 0% of the active ingredient. Therefore, that is what you put in the other spot in the tic-tac-toe 0