Ina class of 45 students 40 are boys and rest are girls The average weight of the girls is 55 kg and...........

Quantitative Aptitude (CPO) Average

Ina class of 45 students, 40% are boys and rest are girls. The average weight of the girls is 55 kg and that of boys is 65 kg. What is the

average weight (in kg) of the whole class?

This questions was previously asked in

SSC CPO 13th-March-2019-Shift-2

60 kg

61 kg

58 kg

59 kg

- Step 1: Calculate the number of boys and girls in the class.

- 40% of 45 students are boys: \(0.4 \times 45 = 18\) boys.

- Remaining 60% are girls: \(45 - 18 = 27\) girls.

- Step 2: Calculate the total weight for boys and girls.

- Total weight of boys: \(18 \times 65 = 1170 \) kg.

- Total weight of girls: \(27 \times 55 = 1485 \) kg.

- Step 3: Calculate the average weight of the whole class.

- Total weight of the class: \(1170 + 1485 = 2655\) kg.

- Average weight: \(\frac{2655}{45} = 59\) kg.

- Conclusion: The average weight of the whole class is 59 kg, which corresponds to Option 4.

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