Solve the Problem $4 \%$ Silver Iodide Solution Must Be Mixed with A

Multiple Choice

Solve the problem.
-In a chemistry class, 5 liters of a $4 \%$ silver iodide solution must be mixed with a $10 \%$ solution to get a $6 \%$ solution. How many liters of the $10 \%$ solution are needed?

A) $1.5 \mathrm{~L}$
B) $5.0 \mathrm{~L}$
C) $2.5 \mathrm{~L}$
D) $3.5 \mathrm{~L}$