The average marks of 30 students is 60. If the marks of 10 students are averaged 50, what is the average of the remaining 20 students? MCQ with Answer and Explanation

Question
The average marks of 30 students is 60. If the marks of 10 students are averaged 50, what is the average of the remaining 20 students?
A. 60
B. 67.5
C. 65
D. 62.5
Answer: Option C
Solution (By JKSSB Mock Tests)
Total sum =30×60=1800. Sum of 10 =10×50=500. Sum of remaining 20 =1800-500=1300. Average =1300/20=65.
This question belongs to: Maths Average
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Question #1
The average of 32,48,64 is
A. 50
B. 45
C. 46
D. 48
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Correct Answer: Option D

Explanation:
144/3=48.
This question belongs to: Maths Average
Question #2
Average of 1425,1900,2375 is
A. 1910
B. 1890
C. 1895
D. 1900
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Correct Answer: Option D

Explanation:
5700/3=1900.
This question belongs to: Maths Average
Question #3
The average of 10 numbers is 18. If one number is 28, what is the average of the remaining 9?
A. 16.5
B. 17.0
C. 17.5
D. 16.89
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Correct Answer: Option D

Explanation:
Sum=10×18=180. Remaining sum=180-28=152. Avg=152/9=16.89.
This question belongs to: Maths Average
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