The ratio of the number of boys and girls in a class is 5 7 The average weight of boys is 56 kg and ...........

Quantitative Aptitude (MTS) Ratio, Proportion

The ratio of the number of boys and girls in a class is 5:7. The average weight of boys is 56 kg and that of girls is 50 kg. What is

ihe average weight (in kg) of all the boys and girls in the class?

This questions was previously asked in

SSC MTS 8th October 2021 Shift-3

52.5

51.8

54.1

53.2

- To find the average weight of all students, use the weighted average formula. Consider the ratio of boys to girls, which is 5:7.

- Let the number of boys be 5x and the number of girls be 7x, so the total number of students is 12x.

- Multiply the average weight by the number of students in each category: Boys = 5x * 56 kg, Girls = 7x * 50 kg.

- Total weight = 280x + 350x = 630x.

- Average weight = Total weight / Total number of students = 630x / 12x = 52.5 kg.

- Option 1, 52.5 kg, is the correct answer.

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