Explanation:

Let's break down the problem:

- 40% of the students are from India.

- 50% of the students are girls.

- 25% of Indian students are girls.

To find out what percentage of non-Indian students are boys:

1. Suppose there are 100 students in total.

2. So, 40 are Indian students and 60 are non-Indian students.

3. Out of the 40 Indian students, 25% are girls, which makes 10 Indian girls.

4. Hence, Indian boys = 40 - 10 = 30.

5. Total girls in the class = 50, since 50% of total students are girls.

6. Non-Indian girls = 50 - 10 = 40.

7. Non-Indian boys = 60 - 40 = 20.

Now, for the percentage of non-Indian students who are boys:

- Percentage = (Non-Indian boys / Non-Indian students) * 100 = (20/60) * 100 = 33.33%.

Correct Answer: Option 1 - 33-33%