In a class, 60% of students are from India and 50% of the students are girls. If 30% of the Indian students…
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?
45%
40%
30%
20%
Solution
Let total students = 100. Indian students = 60, foreign students = 40. Total girls = 50. Indian girls = 30% of 60 = 18. Foreign girls = 50 - 18 = 32. Foreign boys = 40 - 32 = 8. Percentage of foreign students who are boys = $(8/40) \times 100 = 20\%$.