This problem tests your understanding of averages and weighted means, requiring you to use total weight relationships to find the unknown average for a subgroup.
In a class of 52 students, the number of boys is two less than the number of girls. The average weight of the boys is 42 kg, while the average weight of all 52 students is 40 kg. What is the approx. the average weight of the girls.
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Question context
This question is part of 📏 Arithmetic Aptitude within the broader 🧠 Aptitude Mastery subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.