In a class, 60% of students are from India and 50% of the students are girls. If 30% of the Indian students are girls, then what percentage of foreign students are boys?

Let total number of students in the class be 100. Indian students = 60% of 100 = 60 So, foreign students = 100 – 60 = 40 students Total number of girls students = 50% of 100 = 50 According to the question, Total number of Indian girl students = 30% of 60 = 18 students So, foreign girl students = 50 – 18 = 32 As total foreign students = 40 So, foreign boy students = 40 – 32 = 8 So, percentage of boys among foreign students = (8/40) × 100 = 20% Hence, option (d) is the correct answer.