What is the average of all odd numbers from 1 to 19? MCQ with Answer and Explanation

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What is the average of all odd numbers from 1 to 19?

A. 9

B. 10.5

C. 10

D. 9.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Odd numbers: 1,3,5,...,19. There are 10 terms. Sum = n^2 =10^2=100. Average=100/10=10.

This question belongs to: Maths Average

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Question #1

The average of 450,600,750 is

A. 610

B. 595

C. 600

D. 590

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Correct Answer: Option C

Explanation:
1800/3=600.

This question belongs to: Maths Average

Question #2

Average of 9 numbers 2640. If average of 6 is 2635, average of remaining 3?

A. 2648

B. 2650

C. 2645

D. 2655

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Correct Answer: Option B

Explanation:
Sum9=23760. Sum6=15810. Remaining=7950. Average=2650.

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Question #3

Average of 50 numbers 45. If 10 numbers average 55 removed, new average of 40?

A. 40

B. 42.5

C. 43

D. 41

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Correct Answer: Option B

Explanation:
Total=2250. Removed=550. Remaining=1700/40=42.5.

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