Average MCQs

Maths

Average MCQs

Practice Average MCQs with answers and detailed explanations. Learn basic average concepts, average age, marks, salary, speed, combined average, weighted average and advanced aptitude questions designed for SSC, Railway, Banking, UPSC, JKSSB, Police, Teaching and other competitive exams.

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Total Questions

Practice Questions

Page 26 of 49
Question #501
Average of 10 numbers 30. If two numbers 20 and 40 replaced by 25 and 35, new average?
A. 29
B. 31
C. 28
D. 30
Discuss
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Correct Answer: Option D

Explanation:
Net change 0. Average remains 30.
This question belongs to: Maths Average
Question #502
Average of 28,35,42 is
A. 30
B. 33
C. 35
D. 40
Discuss
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Correct Answer: Option C

Explanation:
105/3=35.
This question belongs to: Maths Average
Question #503
Average of 20 numbers 45. If 5 numbers average 50 included, new average of 25?
A. 47
B. 46
C. 44
D. 45.5
Discuss
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Correct Answer: Option B

Explanation:
Total20=900. Added=250. Total1150/25=46.
This question belongs to: Maths Average
Question #504
The average of 9,18,27,36 is
A. 25
B. 22.5
C. 20
D. 24
Discuss
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Correct Answer: Option B

Explanation:
90/4=22.5.
This question belongs to: Maths Average
Question #505
Average of 12 numbers 55. If average of 8 is 50, average of remaining 4?
A. 60
B. 70
C. 62.5
D. 65
Discuss
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Correct Answer: Option D

Explanation:
Sum12=660. Sum8=400. Remaining=260. Average=65.
This question belongs to: Maths Average
Question #506
Average of 5 consecutive odd numbers is 27. Largest?
A. 31
B. 29
C. 35
D. 33
Discuss
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Correct Answer: Option A

Explanation:
Largest=27+4=31.
This question belongs to: Maths Average
Question #507
The average of 16,24,32,40,48,56 is
A. 36
B. 35
C. 30
D. 38
Discuss
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Correct Answer: Option A

Explanation:
Sum=216. Average=36.
This question belongs to: Maths Average
Question #508
Average of 30 numbers 20. If each decreased by 4, new average?
A. 16
B. 20
C. 18
D. 24
Discuss
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Correct Answer: Option A

Explanation:
16.
This question belongs to: Maths Average
Question #509
Average of 21,42,63 is
A. 40
B. 45
C. 35
D. 42
Discuss
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Correct Answer: Option D

Explanation:
126/3=42.
This question belongs to: Maths Average
Question #510
Average of 8 numbers 32. If average of 3 is 28, average of remaining 5?
A. 35
B. 34.4
C. 36
D. 33
Discuss
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Correct Answer: Option B

Explanation:
Sum8=256. Sum3=84. Remaining=172. Average=34.4.
This question belongs to: Maths Average
Question #511
The average of 50,55,60,65 is
A. 55
B. 57.5
C. 60
D. 58
Discuss
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Correct Answer: Option B

Explanation:
230/4=57.5.
This question belongs to: Maths Average
Question #512
Average of 15 numbers 38. If one number 50 replaced by 20, new average?
A. 35
B. 36.67
C. 37
D. 36
Discuss
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Correct Answer: Option B

Explanation:
Change -30, decrease 2. New≈36.
This question belongs to: Maths Average
Question #513
Average of 10,15,20,25,30 is
A. 22
B. 20
C. 25
D. 18
Discuss
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Correct Answer: Option B

Explanation:
100/5=20.
This question belongs to: Maths Average
Question #514
Average of 25 numbers 65. If average of 10 is 60, average of remaining 15?
A. 66
B. 70
C. 68
D. 67
Discuss
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Correct Answer: Option C

Explanation:
Sum25=1625. Sum10=600. Remaining=1025/15≈68.33 approx 68.
This question belongs to: Maths Average
Question #515
The average of 12,24,36,48 is
A. 32
B. 30
C. 28
D. 25
Discuss
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Correct Answer: Option B

Explanation:
120/4=30.
This question belongs to: Maths Average
Question #516
Average of 6 numbers 45. If average of 4 is 40, average of remaining 2?
A. 52.5
B. 55
C. 50
D. 60
Discuss
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Correct Answer: Option B

Explanation:
Sum6=270. Sum4=160. Remaining=110. Average=55.
This question belongs to: Maths Average
Question #517
Average of 9 consecutive numbers is 45. Largest?
A. 47
B. 48
C. 49
D. 50
Discuss
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Correct Answer: Option C

Explanation:
Largest=45+4=49.
This question belongs to: Maths Average
Question #518
The average of 20,40,60,80,100 is
A. 60
B. 50
C. 70
D. 55
Discuss
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Correct Answer: Option A

Explanation:
300/5=60.
This question belongs to: Maths Average
Question #519
Average of 18 numbers 50. If 6 numbers average 55, average of remaining 12?
A. 45
B. 47.5
C. 46
D. 48
Discuss
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Correct Answer: Option B

Explanation:
Sum18=900. Sum6=330. Remaining=570/12=47.5.
This question belongs to: Maths Average
Question #520
Average of 5,10,15,20,25,30,35,40 is
A. 20
B. 25
C. 22.5
D. 23
Discuss
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Correct Answer: Option C

Explanation:
180/8=22.5.
This question belongs to: Maths Average

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