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 $5 \mathrm{~L}$ of a $4 \%$ silver iodide solution to get a $6 \%$ solution?

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