in a class test, 90% of the students passed while the rest failed. if the number od failed students was 3, how many students were there in the class ?
Answers
Answered by
2
Answer:
Step-by-step explanation:
Let the total no. of students be x
Students failed = 90% of x
=9/10x
According to the question
x-9x/10=3
(10x-9x)/10=3
x=10*3
x=30
Therefore, no. of students in the class is 30
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Answered by
3
Answer:
total no of students =x
no of failed students =3
%of students passed =90%
no of students passed =90%of x
according to the question,
no of students passed +no of students failed =total no of
students
90% of x +3=x
90x/100 +3=x
3=x -9x/10
3=10x-9x/10
3=1x/10
x=30
no of students passed =30-3=27
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