Calculating the Percentage of Skilled Workers

To calculate the percentage of skilled workers, we need to determine the number of skilled workers and the total number of workers in the group. We can then divide the number of skilled workers by the total number of workers and multiply by 100 to get the percentage.

Given Information:
- Average salary of unskilled workers = ₹10,000
- Average salary of skilled workers = ₹15,000
- Combined salary of both groups = ₹12,000

Calculating the Number of Skilled Workers

Let's assume the number of unskilled workers in the group is U and the number of skilled workers is S.

Since the average salary of unskilled workers is ₹10,000, the total salary of unskilled workers is U * ₹10,000.

Similarly, the total salary of skilled workers is S * ₹15,000.

Given that the combined salary of both groups is ₹12,000, we can write the equation:

U * ₹10,000 + S * ₹15,000 = ₹12,000

Simplifying the equation, we get:

10,000U + 15,000S = 12,000

Calculating the Total Number of Workers

To calculate the total number of workers, we need to determine the value of U + S.

Since we don't have enough information to solve for U and S separately, we need to make an assumption.

Let's assume that there are an equal number of unskilled and skilled workers in the group, i.e., U = S.

Using this assumption, we can substitute U = S into the equation:

10,000U + 15,000U = 12,000

25,000U = 12,000

U ≈ 0.48

Since the number of workers cannot be a decimal value, we can round U to the nearest whole number. In this case, U ≈ 0, which means there are no unskilled workers in the group.

Calculating the Percentage

The total number of workers is U + S = 0 + S = S.

Therefore, the percentage of skilled workers is:

(S / S) * 100 = 100%

Answer:
The percentage of skilled workers is 100%, which means all the workers in the group are skilled. Therefore, the correct answer is (d) None of these.