Average of 9 consecutive odd numbers is 27. What is the smallest? MCQ with Answer and Explanation

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Average of 9 consecutive odd numbers is 27. What is the smallest?

A. 23

B. 21

C. 17

D. 19

Answer: Option D

Solution (By JKSSB Mock Tests)

Middle=27. Smallest=27 -8=19.

This question belongs to: Maths Average

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Question #1

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If average of x numbers is y and average of z numbers is w, combined average is

A. (y + w)/2

B. x y + z w

C. (x + z) y / (x + z)

D. (x y + z w)/(x+z)

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Correct Answer: Option D

Explanation:
Weighted average formula: (x*y + z*w) / (x + z).

This question belongs to: Maths Average

Question #2

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The average of 4 numbers is 25. If each number is multiplied by 3, what is the new average?

A. 100

B. 25

C. 50

D. 75

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Correct Answer: Option D

Explanation:
If each number is multiplied by a constant, the average also gets multiplied by that constant. New average = 25×3=75.

This question belongs to: Maths Average

Question #3

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The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7.

A. 42.86

B. 42

C. 41.5

D. 43

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Correct Answer: Option A

Explanation:
Sum=8×40=320. Remaining sum=320-20=300. Avg=300/7=42.86.

This question belongs to: Maths Average

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