There are several information's of immense importance already given in the question. It is important to minutely check them before going for solving the problem. Let us assume the number of students at the school = x the total number of students playing at least one sports = 106 Percentage of students playing at least one sports = 40% Then 40% * x = 106 (40/100) * x = 106 4x/10 = 106 4x = 106 * 10 4x = 1060 x = 1060/4 = 265 So there are 265 students at the school.
