Question

in a class total 40% students are boys. 60% of boys and 40% of girls are failed find the total number of students in a class if number of failed students are 480​

Answer 1

Answer:

Let the total no. of students be x

boys %=100%-40%=60%

60% of x=600

60/100*x=600

x=(600*100)/60

x=60000/60

x=1000

Girls=(1000*40)/100

=40000/100

=400girls

Answer 2

Answer: 1188 students

Step-by-step explanation:

Number of failed students = 480

Percentage of failed boys = 60%

Therefore number of boys failed are = 60/100*480 = 288 boys failed

But we have to find the number students in the class, so now let number of boys be x

ATQ : 60% of x = 288

=> 60/100*x = 288

=> 3/5*x = 288

=> x = 288*5/3

=> x = 475

Percentage of boys in a class is 40% , now no. of boys is 475 so let total number of student be y :

ATQ : 40% of y = 475

=> 40/100* y = 475

=> 2/5* y = 475

=> y = 475*5/2

=> y = 1187.5 or 1188

Therefore total number of students = 1188