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Quantitative Aptitude
Averages
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NTPC Graduate Tier 1 2025 Shift-3 📅 05 Jun, 2025

Given are the ages (in years) of five people: 20, 30, 35, 40 and 45. Calculate the average age in years.

A
34
B
30
C
32.5
D
35
Result Summary
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NTPC Graduate Tier 1
2025 • 05 Jun, 2025 • Shift-3
Given are the ages (in years) of five people: 20, 30, 35, 40 and 45. Calculate the average age in years.
Correct Answer
34
[Fundamental Average Concept]: The arithmetic mean (average) of any discrete dataset is calculated by pooling the entire sum of all individual values and dividi......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject Quantitative Aptitude
Chapter -
Ref. Topic Averages
Pg. No -
💡 Analysis & Explanation
[Fundamental Average Concept] ▼
The arithmetic mean (average) of any discrete dataset is calculated by pooling the entire sum of all individual values and dividing it by the total count of those values.
[Data Aggregation] ▼
First, we execute a simple linear addition of the provided ages: 20 + 30 + 35 + 40 + 45. The total accumulated sum is precisely 170 years.
[Division Execution] ▼
We are explicitly given that there are exactly 5 people in this statistical group. Therefore, we divide the aggregated sum (170) by the total frequency (5).
[Final Computation] ▼
170 ÷ 5 = 34.
Conclusion ▼
The mathematically sound average age is 34 years.
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