Question

In an exam 14% students failed and 559 students passed.Determine the number of students who failed.

Answer 1

Let X be total number of Students. Then, 

Total number of students = number of students failed + number of students passed. 

X = X * 14% + 559 
X = (X * 14)/100 + 559 
X = (14X + 55900) / 100 
100X = 14X + 55900 

X = 650 

So the total students are 650, so the number of failed students would be: 

650 - 559 = 91.