The average of 3 numbers is 9. If the numbers are in the ratio 2:3:4, find the smallest. MCQ with Answer and Explanation

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The average of 3 numbers is 9. If the numbers are in the ratio 2:3:4, find the smallest.

A. 5

B. 6

C. 8

D. 7

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=3×9=27. Ratio sum=2+3+4=9. Smallest = (2/9)×27=6.

This question belongs to: Maths Average

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Question #1

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The average of 6 numbers is 29. If one number is 34, find the average of the remaining 5.

A. 27.6

B. 28.2

C. 27.8

D. 28

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Correct Answer: Option D

Explanation:
Sum=6×29=174. Remaining sum=174-34=140. Avg=140/5=28.

This question belongs to: Maths Average

Question #2

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Average of 8 numbers 900. If average of 5 is 895, average of remaining 3?

A. 907

B. 905

C. 910

D. 908.33

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Correct Answer: Option D

Explanation:
Sum8=7200. Sum5=4475. Remaining=2725. Average≈908.33.

This question belongs to: Maths Average

Question #3

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Average of 15 numbers 38. If one number 50 replaced by 20, new average?

A. 37

B. 36

C. 35

D. 36.67

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Correct Answer: Option D

Explanation:
Change -30, decrease 2. New≈36.

This question belongs to: Maths Average

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