Solve the Problem $16 \%$ Saline Solution with A $26 \%$ Saline Solution to Get

Solve the problem.
-A pharmacist wants to mix a $16 \%$ saline solution with a $26 \%$ saline solution to get $15 \mathrm {~L}$ of a $20 \%$ saline solution. How much of each solution should she use?

A) $10 \mathrm {~L}$ of the $16 \%$ solution; $5 \mathrm {~L}$ of the $26 \%$ solution
B) $5 \mathrm {~L}$ of the $16 \%$ solution; $10 \mathrm {~L}$ of the $26 \%$ solution
C) $9 \mathrm {~L}$ of the $16 \%$ solution; $6 \mathrm {~L}$ of the $26 \%$ solution
D) $6 \mathrm {~L}$ of the $16 \%$ solution; $9 \mathrm {~L}$ of the $26 \%$ solution