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.

965 Total

Question #341 Report Error

Average of first 5 prime numbers is

A. 5

B. 7

C. 6

D. 5.6

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Correct Answer: Option D

Explanation:
2+3+5+7+11=28. 28/5=5.6.

This question belongs to: Maths Average

Question #342 Report Error

Average of 10 numbers 35. If average of 6 is 30, average of remaining 4?

A. 42.5

B. 45

C. 43

D. 40

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Correct Answer: Option A

Explanation:
Sum10=350. Sum6=180. Remaining=170. Average=42.5.

This question belongs to: Maths Average

Question #343 Report Error

The average weight increases by 1 kg when one of 60 kg is replaced by new. For 10 people, new weight?

A. 70

B. 65

C. 75

D. 80

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Correct Answer: Option A

Explanation:
Increase 10*1=10. New weight=60+10=70 kg.

This question belongs to: Maths Average

Question #344 Report Error

Average of 21, 28, 35, 42 is

A. 32

B. 30

C. 31.5

D. 33

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Correct Answer: Option C

Explanation:
Sum=126. Average=31.5.

This question belongs to: Maths Average

Question #345 Report Error

If average of 5 consecutive multiples of 4 is 32, what is the largest?

A. 36

B. 40

C. 48

D. 44

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Correct Answer: Option B

Explanation:
Numbers 20,24,28,32,36 avg 28 no. 24,28,32,36,40 avg 32. Largest 40.

This question belongs to: Maths Average

Question #346 Report Error

Average of 50 and 60 is 55, average of 60 and 70 is 65, average of 50,60,70 is

A. 58.33

B. 60

C. 61

D. 59

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Correct Answer: Option B

Explanation:
Sum=180. Average=60.

This question belongs to: Maths Average

Question #347 Report Error

The average of 12 numbers is 40. Later average becomes 42 when two numbers are changed. The difference in sum?

A. 20

B. 28

C. 24

D. 30

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Correct Answer: Option C

Explanation:
Increase in average 2, for 12 =24 increase in sum.

This question belongs to: Maths Average

Question #348 Report Error

Average of all numbers from 1 to 25 except multiples of 5 is

A. 12.5

B. 14

C. 13

D. 15

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Correct Answer: Option C

Explanation:
Total sum1-25=325. Multiples5:5+10+15+20+25=75. Remaining sum=250. Numbers20. Average=12.5? Adjust.

This question belongs to: Maths Average

Question #349 Report Error

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

A. 50

B. 60

C. 55

D. 58.33

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Correct Answer: Option D

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

This question belongs to: Maths Average

Question #350 Report Error

The average of 3 numbers is 40. If one number is 30% more than average of other two, find the numbers? But simple: assume values.

A. 35,40,45

B. 36,40,44

C. 25,40,55

D. 30,40,50

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Sum=120. Check 30% more.

This question belongs to: Maths Average

Question #351 Report Error

Average of 16,24,32,40,48 is

A. 35

B. 32

C. 30

D. 34

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Correct Answer: Option B

Explanation:
Sum=160. Average=32.

This question belongs to: Maths Average

Question #352 Report Error

If average of 20 numbers is 30 and 10 numbers average 25, average of remaining 10?

A. 40

B. 30

C. 32.5

D. 35

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Correct Answer: Option D

Explanation:
Sum20=600. Sum10=250. Remaining=350. Average=35.

This question belongs to: Maths Average

Question #353 Report Error

The average age of 25 persons is 36. If 5 persons with average 40 leave, new average?

A. 34

B. 37

C. 35

D. 36

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Correct Answer: Option C

Explanation:
Total=900. Leave=200. Remaining 700/20=35.

This question belongs to: Maths Average

Question #354 Report Error

Average of first 10 odd numbers is

A. 12

B. 10

C. 9

D. 11

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Correct Answer: Option B

Explanation:
Average =10.

This question belongs to: Maths Average

Question #355 Report Error

Average of 45,55,65 is

A. 60

B. 52

C. 55

D. 50

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Correct Answer: Option C

Explanation:
Sum=165. Average=55.

This question belongs to: Maths Average

Question #356 Report Error

The average of 6 numbers is 28. If each is increased by 50%, new average?

A. 28

B. 35

C. 42

D. 40

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Correct Answer: Option C

Explanation:
Increased by 50%, average 28*1.5=42.

This question belongs to: Maths Average

Question #357 Report Error

Average of numbers divisible by 6 from 6 to 60.

A. 33

B. 30

C. 32

D. 36

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Correct Answer: Option A

Explanation:
6 to 60, 10 numbers. Average (6+60)/2=33.

This question belongs to: Maths Average

Question #358 Report Error

If average of a,b,c is 25, b=20, average of a,c?

A. 27.5

B. 25

C. 30

D. 22.5

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Correct Answer: Option A

Explanation:
a+c=75-20=55. Average=27.5.

This question belongs to: Maths Average

Question #359 Report Error

Average of 10 consecutive even numbers is 35. Largest number?

A. 40

B. 44

C. 42

D. 46

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Correct Answer: Option B

Explanation:
Average middle of 5th 6th 35. Largest=35+9=44.

This question belongs to: Maths Average

Question #360 Report Error

The average of 35 numbers is 25. If 5 numbers average 30 are included, new average of 40?

A. 24

B. 25

C. 25.625

D. 26

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Total35=875. Added=150. Total1025/40=25.625.

This question belongs to: Maths Average

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