367.8 mL
The density of both lead and iron is greater than the density of water, so they'll both sink. When they sink, the volume of the water plus metals will increase by the volume of the metals. So let's see what those volumes are.
Lead has a density of 11.34 g/cm3
Since we have 5.0 grams of lead, the volume will be
5.0 g / 11.34 g/cm3 = 0.440917 cm3
Iron has a density of 7.87 g/cm3
Since we have 3.2 grams of iron, the volume will be
3.2 g / 7.87 g/cm3 = 0.406607 cm3
The total volume will be the sum of the volumes of water, lead, and iron. Giving
367 cm3 + 0.440917 cm3 + 0.406607 cm3 = 367.8475 cm3
Rounding to tenths gives 367.8 cm3 or 367.8 mL
