Question 880712
This and your other two mixture questions are of this same type, and the general solution (meaning how to answer the question and the solving process) is the same for each of them.


<a href="http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev">This lesson shows how to solve this kind of problem.  Mixing two concentrations for known amount of mixture</a>