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NTPC Graduate Tier 1 2025 Shift-2 📅 05 Jun, 2025

The arithmetic mean of 25 real numbers is 110. If 10 numbers are increased by 12.5 each, another 10 numbers are increased by 15 each and the remaining 5 numbers are unaltered, then the new value of the arithmetic mean is:

A
125
B
121
C
120
D
112
Result Summary
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NTPC Graduate Tier 1
2025 • 05 Jun, 2025 • Shift-2
The arithmetic mean of 25 real numbers is 110. If 10 numbers are increased by 12.5 each, another 10 numbers are increased by 15 each and the remaining 5 numbers are unaltered, then the new value of the arithmetic mean is:
Correct Answer
121
Original Aggregate Analysis: We start with an anchor set of 25 variables averaging 110. The foundational aggregate sum operates entirely as 25 * 110 = 2750.Modi......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject Mathematics
Chapter -
Ref. Topic Average
Pg. No -
💡 Analysis & Explanation
Original Aggregate Analysis ▼
We start with an anchor set of 25 variables averaging 110. The foundational aggregate sum operates entirely as 25 * 110 = 2750.
Modification Metrics ▼
We systematically elevate specific subsets. Ten items leap by 12.5 (adding 125 total). Another ten items leap by 15 (adding 150 total). The net injected value acts strictly as 125 + 150 = 275.
Revised Totality Structuring ▼
By absorbing these precise adjustments, the new overarching sum escalates to 2750 + 275 = 3025.
Final Assessment Projection ▼
Distributing this fresh total uniformly across the unchanged pool of 25 items renders 3025 / 25.
Conclusion ▼
The calculated revised arithmetic benchmark securely validates as 121.
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