Average MCQs with Answers and Explanations for Competitive Exams

Question #461

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Average of 12 numbers 45. If average of 9 is 42, average of remaining 3?

A. 52

B. 50

C. 54

D. 48

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Correct Answer: Option A

Explanation:
Sum12=540. Sum9=378. Remaining=162. Average=54.

This question belongs to: Maths Average

Question #462

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The average of 10,20,30,40,50 is

A. 30

B. 28

C. 32

D. 35

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Correct Answer: Option A

Explanation:
Sum=150. Average=30.

This question belongs to: Maths Average

Question #463

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If average of 6 numbers is 30 and average of 3 is 25, average of remaining 3?

A. 36

B. 30

C. 32

D. 35

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Correct Answer: Option D

Explanation:
Sum6=180. Sum3=75. Remaining=105. Average=35.

This question belongs to: Maths Average

Question #464

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Average of 1 to 20 except 10 is

A. 11

B. 10.5

C. 10

D. 9.5

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Correct Answer: Option B

Explanation:
Sum=210-10=200. Numbers19. Average≈10.53.

This question belongs to: Maths Average

Question #465

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The average of 60,70,80 is

A. 72

B. 75

C. 65

D. 70

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Correct Answer: Option D

Explanation:
Sum=210. Average=70.

This question belongs to: Maths Average

Question #466

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Average of 16 numbers 25. If 4 numbers average 30, average of remaining 12?

A. 25

B. 23.33

C. 22

D. 24

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Correct Answer: Option B

Explanation:
Sum16=400. Sum4=120. Remaining=280/12≈23.33.

This question belongs to: Maths Average

Question #467

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Average of 21 consecutive numbers is 50. Smallest number?

A. 39

B. 40

C. 41

D. 42

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Correct Answer: Option B

Explanation:
Middle 11th=50. Smallest=50-10=40.

This question belongs to: Maths Average

Question #468

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The average of 8,16,24,32,40 is

A. 22

B. 25

C. 24

D. 26

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Correct Answer: Option C

Explanation:
Sum=120. Average=24.

This question belongs to: Maths Average

Question #469

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Average of 25 numbers 55. If 5 numbers average 65 removed, new average of 20?

A. 53

B. 51

C. 50

D. 52.5

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Correct Answer: Option D

Explanation:
Total=1375. Removed=325. Remaining=1050/20=52.5.

This question belongs to: Maths Average

Question #470

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Average of 7 numbers 40. If average of 3 is 35, average of remaining 4?

A. 45

B. 40

C. 43.75

D. 42

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Correct Answer: Option C

Explanation:
Sum7=280. Sum3=105. Remaining=175. Average=43.75.

This question belongs to: Maths Average

Question #471

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The average of 12,18,24,30 is

A. 21

B. 24

C. 22

D. 20

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Correct Answer: Option A

Explanation:
Sum=84. Average=21.

This question belongs to: Maths Average

Question #472

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Average of 20 numbers 35. If 5 numbers average 40 included, new average of 25?

A. 34

B. 36

C. 37

D. 35.8

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Correct Answer: Option B

Explanation:
Total20=700. Added=200. Total900/25=36.

This question belongs to: Maths Average

Question #473

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Average of 9,27,45 is

A. 28

B. 27

C. 30

D. 25

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Correct Answer: Option B

Explanation:
Sum=81. Average=27.

This question belongs to: Maths Average

Question #474

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The average of first 15 multiples of 4 is

A. 34

B. 28

C. 30

D. 32

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Correct Answer: Option D

Explanation:
4*(1+15)/2=32.

This question belongs to: Maths Average

Question #475

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Average of 40 numbers 28. If 10 numbers average 32, average of remaining 30?

A. 24

B. 26

C. 25

D. 27

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Correct Answer: Option B

Explanation:
Total=1120. 10=320. Remaining=800/30≈26.67 approx 26.

This question belongs to: Maths Average

Question #476

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Average of 22,33,44,55 is

A. 38.5

B. 40

C. 36

D. 39

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Correct Answer: Option A

Explanation:
Sum=154. Average=38.5.

This question belongs to: Maths Average

Question #477

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Average of 8 numbers 50. If average of 5 is 45, average of remaining 3?

A. 60

B. 58.33

C. 55

D. 57

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Correct Answer: Option B

Explanation:
Sum8=400. Sum5=225. Remaining=175. Average≈58.33.

This question belongs to: Maths Average

Question #478

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The average of all numbers from 1 to 60 divisible by 5 is

A. 35

B. 32.5

C. 25

D. 30

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Correct Answer: Option B

Explanation:
5 to 60. 12 numbers. Average 5*(1+12)/2=32.5.

This question belongs to: Maths Average

Question #479

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Average of 10,20,30,40 is

A. 22.5

B. 30

C. 20

D. 25

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Correct Answer: Option D

Explanation:
100/4=25.

This question belongs to: Maths Average

Question #480

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Average of 30 numbers 25. If each number is increased by 10%, new average?

A. 26

B. 25

C. 30

D. 27.5

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Correct Answer: Option D

Explanation:
Increased by 10%, average 27.5.

This question belongs to: Maths Average

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