How Many Liters (L) of A $10 \%$ Silver Iodide Solution Must Be Mixed With

Multiple Choice

How many liters (L) of a $10 \%$ silver iodide solution must be mixed with $6 \mathrm{~L}$ of a $4 \%$ silver iodide solution to get a $6 \%$ solution?

A) $6.0 \mathrm{~L}$
B) $3.0 \mathrm{~L}$
C) $4.0 \mathrm{~L}$
D) $2.0 \mathrm{~L}$