SSC Government Jobs Exams Numerical Ability Permutation and Combination

in an examination,the average marks obtained by students whio passed was x%,while the average of thoes who failed was y%.the average marks of student taking the exam was z%.find in terms of x,y,&z the percetage of students taking the exam who failed.

Read Solution (Total 1)

Passed Failed Overall
Percentage x y z
No of students ratio z-y x-z
So, total number of students who took the exam = (z-y)+ (x-z)= x-y
Failed students = x-z
Required percentage = (x-z)/(x-y) *100
10 years agoHelpfull: Yes(1) No(3)

SSC Other Question

A can do piece of work in 10 days and B in 20 days. They begin together but A leaves 2 days before the completion of the work. The whole work be done in if the graph of the equation 2x+3y=6 form a triangle with co-ordinates axes,then the area of triangle will be