In a certain school, 20% of students are below 8 years of age. If the number of students whose ages are equal to or greater than 8 years of age is 96, what is the total number of students in the school?

300

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200

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400

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500

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600

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Solution

The correct option is C
400

$∵$ 20% of the students are below 8 years, 80% of the students are equal to or greater than 8 years.
Let the total number of students be $x$ .
80% of total number of students $= \frac{80}{100} \times x$
$\frac{80}{100} \times x = 96 x = \frac{96 \times 100}{80} x = 120$
Total number of students in the school $= 120$

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In a certain school, 20% of students are below 8 years of age. If the number of students whose ages are equal to or greater than 8 years of age is 96, what is the total number of students in the school?

The correct option is C 400 ∵ 20% of the students are below 8 years, 80% of the students are equal to or greater than 8 years. Let the total number of students be x. 80% of total number of students =80100×x 80100×x=96x=96×10080x=120 Total number of students in the school =120