If in the pharmacy you have two solutions of different concentrations (such as 2% and 10% concentration), but are asked to make a 5% solution - you need to know how much of the 2% solution and 10% solution must be mixed to produce this target concentration. The alligation method is used to help you calculate the volumes needed. Here in this question, we review a PTCB exam-style question on this very topic. #alligationmethod #ptcbmath #ptcbtestprep #pharmacytechnician #pharmacytech #ptcbexam #ptcbtest