Question

11/15 studant pass and
416 studant fail find the total studant in a class

Answer 1

let the total students be x

number of students passed

= 11x/15

number of students failed

= 416

ATQ

11x/15 + 416 = x

x - 11x/15 = 416

4x/15 = 416

x = 416 x 15/4

x = 1560

total students = 1560

Answer 2

(Let) Total number of students = N
Out every 15 students  11 passed.   that is the meaning of 11/15 pass.

So 4 students failed out of 15 students.
if 416 total students failed  then total number N ?
     N = 416 * 15 / 4 = 104*15 = 1, 560