Question

In a class, 60% of student failed and 500 student passed. Find the number that failed

Answer 1

In a class,60℅ of student failed and 500 students passed. So, the total number that failed is 750 students.

Total=100℅
so, 100-60=40℅
40℅=500
then,
500÷4=125
so, 10℅=125
125×2=250
20℅=250
now,
60℅= 40℅+20
60℅=500+250
60℅=750students failed

Answer 2

total students = 100%
students failed = 60%
students passed= 100% -60% = 40 %

according to question 500 students passed 

so , let the number of all the students be x  
 
now , 40/100*x=500
                       x = 1250
 total number of students = 1250 

students failed  = 60 %
number of students failed = 60/100*1250
                                          = 750 students 

so 750 students failed in class  

hope i helped you 
 
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