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
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Answered by
7
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
Answered by
4
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
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