1. STAR Labs needs a 15% acid solution for a certain test. Dr. Kaitlyn, the head lab technician discovers the supplier only shipped a 10% solution and a 30% solution. Instead of reordering, she decides to mix 10% solution with 30% solution, to make the 15% solution. The lab needs 10 liters of the 15% acid solution. How many liters of 10% solution and 30% solution should she use? For the following do not use trial and error! Remember to set up let statements, equations and solve.

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Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.