In which school, the number of students is the largest ?

In A, 40% of students scored above 60% marks, the number of them being equal to 1160. Hence, the total number of students is 2900.

In B, 30% of students scored above 60% marks, the number of them being equal to 1170. Hence, the total number of students is 3900.

In C, 50% of students scored above 60% marks, the number of them being equal to 1170. Hence, the total number of students is 2340.

In D, 15% of students scored above 60% marks, the number of them being equal to 1200. Hence, the total number of students is 8000.

In E, 40% of students scored above 60% marks, the number of them being equal to 1600. Hence, the total number of students is 4000.

Hence, D has the largest number of students.