There are several information's already given in the question. Lat us first write them down and then go for solving the problem.
Total number of pupil <span>in Secondary one = 225 Let us assume the number of pupil who do not pay the school fees through GIRO scheme = x Then Number </span>of pupil who pay the school fees through GIRO scheme = 14x So x + 14x = 225 15x = 225 x = 15 From the above deduction, it can be concluded that 15 pupil did not join the scheme.