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Mathematics
Averages
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NTPC Graduate Tier 1 2025 Shift-1 📅 06 May, 2025

A class of 30 students appeared in a test. The average score of 12 students is 60, and that of the rest is 62. What is the average score of the class?

A
61.2
B
62.2
C
60.2
D
59.2
Result Summary
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NTPC Graduate Tier 1
2025 • 06 May, 2025 • Shift-1
A class of 30 students appeared in a test. The average score of 12 students is 60, and that of the rest is 62. What is the average score of the class?
Correct Answer
61.2
Group 1 Calculation: The total score for the first set of 12 students is found by multiplying their count by their average: 12 × 60 = 720.Group 2 Calculat......
Ref/Book : NTPC Graduate Tier 1 2025
Ref. Subject Mathematics
Chapter -
Ref. Topic Averages
Pg. No -
💡 Analysis & Explanation
Group 1 Calculation ▼
The total score for the first set of 12 students is found by multiplying their count by their average: 12 × 60 = 720.
Group 2 Calculation ▼
The remaining students number 18 (30 total - 12). Their total score is 18 × 62 = 1116.
Overall Average ▼
To find the class average, add both totals (720 + 1116 = 1836) and divide by the total number of students (30). 1836 / 30 equals 61.2.
Conclusion ▼
The combined average score of the entire class is exactly 61.2.
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