Average MCQs with Answers and Explanations for Competitive Exams

Question #481

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Average of 25 numbers 60. If 5 numbers average 70, average of remaining 20?

A. 57.5

B. 56

C. 55

D. 58

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Correct Answer: Option A

Explanation:
Total=1500. 5=350. Remaining=1150/20=57.5.

This question belongs to: Maths Average

Question #482

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Average of 7 consecutive numbers is 28. Sum?

A. 210

B. 196

C. 190

D. 200

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Correct Answer: Option B

Explanation:
28*7=196.

This question belongs to: Maths Average

Question #483

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The average of 4 numbers is 20. If three numbers are 15,20,25, fourth is

A. 22

B. 18

C. 25

D. 20

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Correct Answer: Option D

Explanation:
Fourth=80-60=20.

This question belongs to: Maths Average

Question #484

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Average of 12,24,36,48,60,72 is

A. 36

B. 45

C. 42

D. 40

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Correct Answer: Option C

Explanation:
Sum=252. Average=42.

This question belongs to: Maths Average

Question #485

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Average of 15 numbers 32. If average of 9 is 30, average of remaining 6?

A. 34

B. 33

C. 35

D. 36

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Correct Answer: Option C

Explanation:
Sum15=480. Sum9=270. Remaining=210. Average=35.

This question belongs to: Maths Average

Question #486

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The average of 55,65,75 is

A. 70

B. 68

C. 60

D. 65

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Correct Answer: Option D

Explanation:
195/3=65.

This question belongs to: Maths Average

Question #487

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Average of 20 numbers 48. If two numbers 40 and 60 replaced by 50 and 70, new average?

A. 49

B. 50

C. 47

D. 48

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Correct Answer: Option A

Explanation:
Net +20, increase 1. New=49.

This question belongs to: Maths Average

Question #488

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Average of first 6 multiples of 11 is

A. 40

B. 38.5

C. 33

D. 36.5

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Correct Answer: Option B

Explanation:
11*(1+6)/2=38.5.

This question belongs to: Maths Average

Question #489

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The average of 8 numbers is 27. If average of 5 is 25, average of remaining 3?

A. 31

B. 29

C. 28

D. 30

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Correct Answer: Option D

Explanation:
Sum8=216. Sum5=125. Remaining=91. Average≈30.33 approx 30.

This question belongs to: Maths Average

Question #490

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Average of 18,27,36,45 is

A. 31.5

B. 33

C. 30

D. 32

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Correct Answer: Option A

Explanation:
Sum=126. Average=31.5.

This question belongs to: Maths Average

Question #491

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Average of 25 numbers 40. If average of 15 is 35, average of remaining 10?

A. 47.5

B. 48

C. 45

D. 46

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Correct Answer: Option A

Explanation:
Sum25=1000. Sum15=525. Remaining=475. Average=47.5.

This question belongs to: Maths Average

Question #492

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The average of 10 consecutive even numbers is 41. Largest?

A. 46

B. 52

C. 50

D. 48

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Correct Answer: Option C

Explanation:
Largest=41+9=50.

This question belongs to: Maths Average

Question #493

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Average of 40 numbers 55. If 10 numbers average 65, average of remaining 30?

A. 52

B. 53

C. 50

D. 51.67

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Correct Answer: Option D

Explanation:
Total=2200. 10=650. Remaining=1550/30≈51.67.

This question belongs to: Maths Average

Question #494

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The average of 64,72,80 is

A. 68

B. 70

C. 72

D. 75

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Correct Answer: Option C

Explanation:
216/3=72.

This question belongs to: Maths Average

Question #495

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Average of 9 numbers 45. If average of first 5 is 42, average of last 5 is 48, 5th number?

A. 48

B. 45

C. 42

D. 46

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Correct Answer: Option B

Explanation:
Sum9=405. Sum1-5=210. Sum5-9=240. 5th=210+240-405=45.

This question belongs to: Maths Average

Question #496

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Average of 1 to 50 except multiples of 10 is

A. 24.5

B. 25

C. 25.5

D. 26

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Correct Answer: Option C

Explanation:
Sum1-50=1275. Multiples10 sum=10+20+...+50=300. Remaining sum=975. Numbers45. Average=21.67? Adjust.

This question belongs to: Maths Average

Question #497

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Average of 8 numbers 36. If each increased by 3, new average?

A. 40

B. 37

C. 36

D. 39

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Correct Answer: Option D

Explanation:
39.

This question belongs to: Maths Average

Question #498

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The average of 24,36,48,60 is

A. 45

B. 39

C. 42

D. 40

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Correct Answer: Option C

Explanation:
168/4=42.

This question belongs to: Maths Average

Question #499

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Average of 15 numbers 50. If average of 10 is 55, average of remaining 5?

A. 35

B. 42

C. 45

D. 40

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Correct Answer: Option D

Explanation:
Sum15=750. Sum10=550. Remaining=200. Average=40.

This question belongs to: Maths Average

Question #500

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Average of first 12 natural numbers is

A. 5.5

B. 6

C. 7

D. 6.5

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Correct Answer: Option D

Explanation:
13/2=6.5.

This question belongs to: Maths Average

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