Square of a number students are advised to commit to memory.

100 students appeared in annual exami-nation. 60 students passed. The ratio of the number of students who failed to the total number of students is

Direction: There are 1250 total students in 5 different classes in a school. The number of students in class I is 50 less than the number of students in class II. The number of class IV students is 50 more than the number of students in class II. The average number of students in class III and class V is 250. The number of students in class III is 10% less than the number of students in class I. The ratio of the total number of students of class V to the total number of students of class III is

Three eighth of the students of a class opted for visiting an old age home.Sixteen students opted for having a nature walk.Square root of total number of students in the class opted for tree plantation in the school.The number of students who visited an old age home is same as the number of students who went for a nature walk and did tree plantation.Find the total number of students