Average of 10 numbers is 40. If each number is multiplied by 2, what is the new average? MCQ with Answer and Explanation

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Average of 10 numbers is 40. If each number is multiplied by 2, what is the new average?

A. 40

B. 80

C. 20

D. 60

Answer: Option B

Solution (By JKSSB Mock Tests)

If each number is multiplied by a constant, average is also multiplied by the same. New average = 40 × 2 = 80.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Average of 8 numbers 22. If 4 numbers average 20, other 4 average?

A. 24

B. 23

C. 22

D. 26

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Correct Answer: Option A

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

This question belongs to: Maths Average

Question #2

Find the average of the first 10 multiples of 2.

A. 10

B. 11.5

C. 12

D. 11

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Correct Answer: Option D

Explanation:
Multiples: 2,4,6,...,20 sum=110, count=10, avg=11.

This question belongs to: Maths Average

Question #3

Average of 30 students 60 marks. If 10 students 70 marks, average of remaining 20?

A. 58

B. 55

C. 52

D. 50

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Correct Answer: Option B

Explanation:
Total=1800. 10=700. Remaining=1100/20=55.

This question belongs to: Maths Average

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