There are 100 students in a class out of which 70 are girls and others are boys The average score of...........

Quantitative Aptitude (MTS) Average

There are 100 students in a class, out of which 70% are girls and others are boys. The average score of girls in a test is 20%

more than that of boys. If the average score of all the students is 57, then what is the average score of girls?

This questions was previously asked in

SSC MTS 2nd Nov 2021 Shift-2

- The class has 100 students: 70% girls and 30% boys.

- This means there are 70 girls and 30 boys.

- The average score of girls is 20% more than that of the boys.

- Let the average score of boys be B. Then, the average score of girls would be 1.2B.

- Total average of all students is 57. So, \((70 \times 1.2B + 30 \times B) / 100 = 57\).

- Solving this: \(84B + 30B = 5700\), leading to \(114B = 5700\), so \(B = 50\).

- Average score of girls (1.2B) = 1.2 × 50 = 60.

- The correct option is Option 1: 60 .

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