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Question
In a certain school, 20% of students are below 8 years of age. The number of students above 8 years of age is two-third of the number of students of 8 years of age which is 48. what is the total number of students in the school?
72
60
80
100
None of these
ANSWER : 4
Descrption
<p>Let, the number be x then <br /> Number of students above 8 years age = (100 - 201% of x) = 80% of x <br /> <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> 48 + <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#xA0;</mo><mfrac><mn>2</mn><mn>3</mn></mfrac></math> of 48 <br /> <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x21D2;</mo><mfrac><mn>80</mn><mn>100</mn></mfrac></math> x = 80<br /> <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> x = 100</p>
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