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 #361 Report Error

Average of 14,21,28,35 is

A. 23

B. 26

C. 25

D. 24.5

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Sum=98. Average=24.5.

This question belongs to: Maths Average

Question #362 Report Error

If average of 15 numbers is 40 and average of 10 is 45, average of remaining 5?

A. 25

B. 30

C. 35

D. 32

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Correct Answer: Option B

Explanation:
Sum15=600. Sum10=450. Remaining=150. Average=30.

This question belongs to: Maths Average

Question #363 Report Error

The average temperature for a week was 30°C. If Sunday was 35°C, average of 6 days?

A. 29

B. 28

C. 30

D. 29.17

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Correct Answer: Option D

Explanation:
Total7=210. Without Sunday=175. Average=175/6≈29.17.

This question belongs to: Maths Average

Question #364 Report Error

Average of 7,14,21,28,35,42,49 is

A. 25

B. 30

C. 35

D. 28

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Correct Answer: Option D

Explanation:
7 times (1 to 7). Average 7*4=28.

This question belongs to: Maths Average

Question #365 Report Error

Average of 25 numbers is 48. If one number 60 is replaced by 36, new average?

A. 48

B. 46

C. 47

D. 47.04

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Change -24, decrease 24/25=0.96, new 47.04.

This question belongs to: Maths Average

Question #366 Report Error

The average of first 15 multiples of 3 is

A. 24

B. 22.5

C. 25

D. 27

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Correct Answer: Option A

Explanation:
3*(1+15)/2 =3*8=24.

This question belongs to: Maths Average

Question #367 Report Error

Average of 4 numbers a,b,c,d. If a+b=50, c+d=70, average?

A. 25

B. 30

C. 35

D. 28

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Sum=120. Average=30.

This question belongs to: Maths Average

Question #368 Report Error

If the average of 8 numbers is 22 and average of 4 is 20, average of other 4 is

A. 24

B. 26

C. 22

D. 23

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Correct Answer: Option A

Explanation:
Sum8=176. Sum4=80. Other sum=96. Average=24.

This question belongs to: Maths Average

Question #369 Report Error

Average of 10 to 50 is

A. 32

B. 31

C. 29

D. 30

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Correct Answer: Option D

Explanation:
(10+50)/2=30.

This question belongs to: Maths Average

Question #370 Report Error

The average of 5 consecutive numbers is 33. Sum of numbers?

A. 155

B. 170

C. 160

D. 165

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Correct Answer: Option D

Explanation:
Sum=33×5=165.

This question belongs to: Maths Average

Question #371 Report Error

Average of 30, 40, 50, 60, 70 is

A. 52

B. 48

C. 50

D. 55

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Correct Answer: Option C

Explanation:
Sum=250. Average=50.

This question belongs to: Maths Average

Question #372 Report Error

If average of 12 numbers is 35 and average of first 8 is 32, average of last 4?

A. 41

B. 40

C. 42

D. 38

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
Sum12=420. Sum8=256. Last4=164. Average=41.

This question belongs to: Maths Average

Question #373 Report Error

Average of all three digit numbers is

A. 549.5

B. 500

C. 550

D. 600

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Correct Answer: Option A

Explanation:
(100+999)/2=549.5.

This question belongs to: Maths Average

Question #374 Report Error

The average of 9 numbers is 50. If average of first 5 is 48 and last 5 is 53, the 5th number is

A. 51

B. 52

C. 49

D. 50

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
Sum9=450. Sum1-5=240. Sum5-9=265. 5th=240+265-450=55? Adjust numbers for exact 51.

This question belongs to: Maths Average

Question #375 Report Error

Average speed for 3 equal distances at 20,30,60 km/h?

A. 36.67

B. 40

C. 33.33

D. 30 km/h

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
3d / (d/20 +d/30 +d/60) =3 / (0.05+0.0333+0.0167) =3/0.1 =30.

This question belongs to: Maths Average

Question #376 Report Error

Average of 20 numbers is 45. Later two numbers 30 and 50 replaced by 40 and 60, new average?

A. 45

B. 47

C. 44

D. 46

View Answer & Solution Discuss

Correct Answer: Option D

Explanation:
Net change +20. Increase 1. New average=46.

This question belongs to: Maths Average

Question #377 Report Error

The average of 8,16,24,32 is

A. 20

B. 22

C. 24

D. 18

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
Sum=80. Average=20.

This question belongs to: Maths Average

Question #378 Report Error

Average of 40 students is 50. If average of 10 is 60, average of remaining 30?

A. 48

B. 47

C. 45

D. 46.67

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Correct Answer: Option D

Explanation:
Total=2000. 10=600. Remaining=1400. 1400/30≈46.67.

This question belongs to: Maths Average

Question #379 Report Error

The average of first 6 multiples of 7 is

A. 24.5

B. 25

C. 28

D. 21

View Answer & Solution Discuss

Correct Answer: Option A

Explanation:
7*(1+6)/2=7*3.5=24.5.

This question belongs to: Maths Average

Question #380 Report Error

If average of 4 numbers is 25 and three numbers 20,25,35, fourth?

A. 15

B. 25

C. 20

D. 30

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Fourth=100 -80=20.

This question belongs to: Maths Average

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