Average of 30 numbers 40. If 10 numbers average 50 removed, new average of 20? MCQ with Answer and Explanation

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Average of 30 numbers 40. If 10 numbers average 50 removed, new average of 20?

A. 35

B. 30

C. 32

D. 36

Answer: Option A

Solution (By JKExamLibrary)

Total=1200. Removed=500. Remaining=700/20=35.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1840. If average of 6 is 1835, average of remaining 3?

A. 1845

B. 1848

C. 1850

D. 1855

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Correct Answer: Option C

Explanation:
Sum9=16560. Sum6=11010. Remaining=5550. Average=1850.

This question belongs to: Maths Average

Question #2

The average of five numbers is 27. If one number is excluded, the average becomes 25. What is the excluded number?

A. 30

B. 40

C. 45

D. 35

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Correct Answer: Option D

Explanation:
Sum of five numbers = 5 × 27 = 135. Sum of four numbers = 4 × 25 = 100. Excluded number = 135 - 100 = 35.

This question belongs to: Maths Average

Question #3

The average of 8 numbers is 34. If each number is multiplied by 1.5, what is the new average?

A. 34

B. 51

C. 25.5

D. 68

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Correct Answer: Option B

Explanation:
New average =34×1.5=51.

This question belongs to: Maths Average

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