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In a primary school, 10% of students are below 11 years of age. The number of students above 11 years of age is 3/4 of the number of students of 11 years of age which is 36. What is the total number of students in the school?
A72
B80
C70
D150
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Acc. to the question the number of students of 11yrs age be 36
Then children above 11 yrs of age is 3/4&*36=27
And children below 11yrs of age be 10x/100 where x is the total number of students
So finally 10x/100+27+36=x
Solving we get x=70
Then children above 11 yrs of age is 3/4&*36=27
And children below 11yrs of age be 10x/100 where x is the total number of students
So finally 10x/100+27+36=x
Solving we get x=70
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