Osmosis

A student places identical potato cubes into three beakers:

- Beaker X: distilled water
- Beaker Y: 0.3 mol $\text{dm}^{-3}$ salt solution
- Beaker Z: 0.6 mol $\text{dm}^{-3}$ salt solution

After 30 minutes, in which beaker will the potato cubes lose the most mass due to osmosis?