What is the average of the first 10 odd numbers? MCQ with Answer and Explanation

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What is the average of the first 10 odd numbers?

A. 9.5

B. 11

C. 10.5

D. 10

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum of first 10 odd =10^2=100. Average=100/10=10.

This question belongs to: Maths Average

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Question #1

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

A. 30

B. 31

C. 28

D. 29

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Correct Answer: Option A

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

This question belongs to: Maths Average

Question #2

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Average of 25 numbers 85. If average of 15 is 90, average of remaining 10?

A. 80

B. 75

C. 78

D. 77.5

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Correct Answer: Option D

Explanation:
Total=2125. Sum15=1350. Remaining=775/10=77.5.

This question belongs to: Maths Average

Question #3

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Average weight of 20 girls 45 kg. If 5 boys average 55 kg included, new average for 25?

A. 48

B. 50

C. 46

D. 47

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Correct Answer: Option D

Explanation:
Girls 900. Boys 275. Total 1175/25=47.

This question belongs to: Maths Average

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