Question
Download Solution PDFThere are 75 boys and 45 girls in a class. If the average weight of boys is 60 kg and the average weight of girls is 40 kg, then find the average weight of the whole class.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
75 boys weigh 60 kg each on average, 45 girls weigh 40 kg each on average.
Concept:
Total average weight = Total weight / Total number of individuals.
Solution:
Total weight of boys = 75 × 60 = 4500 kg.
Total weight of girls = 45 × 40 = 1800 kg.
Average weight = (4500 + 1800) / (75 + 45) = 52.5 kg.
Therefore, the average weight of the whole class is 52.5 kg.
Last updated on Jul 8, 2025
-> The Staff Selection Commission released the SSC GD 2025 Answer Key on 26th June 2025 on the official website.
-> The SSC GD Notification 2026 will be released in October 2025 and the exam will be scheduled in the month of January and February 2026.
-> Now the total number of vacancy is 53,690. Previously, SSC GD 2025 Notification was released for 39481 Vacancies.
-> The selection process includes CBT, PET/PST, Medical Examination, and Document Verification.
-> The candidates who will be appearing for the 2026 cycle in the exam must attempt the SSC GD Constable Previous Year Papers. Also, attempt SSC GD Constable Mock Tests.