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NTPC Graduate Tier 1 2016 Shift 2 📅 02 Apr, 2016

The average of first 20 multiples of 12 is:

A
124
B
120
C
126
D
130
Result Summary
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APEDIA

NTPC Graduate Tier 1
2016 • 02 Apr, 2016 • Shift 2
The average of first 20 multiples of 12 is:
Correct Answer
126
Sequence Identification: The first 20 natural multiples of the number 12 mathematically form a strictly linear arithmetic progression starting exactly from 12 a......
Ref/Book : NTPC Graduate Tier 1 2016
Ref. Subject Statistics
Chapter -
Ref. Topic Mean, Median, Mode
Pg. No -
💡 Analysis & Explanation
Sequence Identification ▼
The first 20 natural multiples of the number 12 mathematically form a strictly linear arithmetic progression starting exactly from 12 and ending at (12 * 20) = 240.
Average Formula Application ▼
For any uniform arithmetic progression, the exact average (arithmetic mean) is simply the numerical sum of the first term and the absolute last term, cleanly divided by 2.
Mathematical Calculation ▼
The initial term is 12 and the final term is 240. The sum = 12 + 240 = 252. Dividing this exact sum by 2 gives exactly 126.
Conclusion ▼
The true average of this specific numeric sequence is 126.
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