Final answer:
To find the sugar concentration in the solution, divide the mass of sugar by the total mass of the solution.
Step-by-step explanation:
To find the sugar concentration in the solution, we need to calculate the mass of sugar dissolved in the water and express it as a ratio to the total mass of the solution.
First, add the masses of sugar and water: 50 g + 30 g = 80 g.
Next, divide the mass of sugar by the total mass of the solution: 50 g / 80 g.
Therefore, the sugar concentration is 50 g/80 g, which is option c.