The age of the new person is 35. This is calculated by first finding the total age of the initial three people, then finding the new total age with the new average, and finally subtracting the original total age from the new total age.
If the ages of 3 persons are 17, 16, and 12, and another person is added making the average age 20, what is the age of the new person?
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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.