In a batch of certain grade, there are 30 girls whose aggregate English marks are above 75%. If these constitute two-third of the girls and the total number of girls is three-fourths of the total number of students in the class, what is the number of boys in the class?

Correct option is A

In a batch of certain grade, there are 30 girls whose aggregate English marks are above 75%. If these constitute two-third of the girls and the total number of girls is three-fourths of the total number of students in the class, 15 number of boys in the class