Average of 20 numbers is 45. If 5 numbers with average 50 are removed, new average? MCQ with Answer and Explanation

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Average of 20 numbers is 45. If 5 numbers with average 50 are removed, new average?

A. 42

B. 43.33

C. 44

D. 45

Answer: Option B

Solution (By JKExamLibrary)

Sum20=900. Sum5=250. Remaining sum=650. Numbers15. Average≈43.33.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1 Report Error

Average of 10 observations 25. Later one 35 replaced by 15, new average?

A. 24

B. 23

C. 25

D. 26

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Correct Answer: Option A

Explanation:
Change -20, decrease 2, new 23? Wait 25-2=23.

This question belongs to: Maths Average

Question #2 Report Error

Average of 9 numbers 1640. If average of 6 is 1635, average of remaining 3?

A. 1645

B. 1655

C. 1648

D. 1650

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Correct Answer: Option D

Explanation:
Sum9=14760. Sum6=9810. Remaining=4950. Average=1650.

This question belongs to: Maths Average

Question #3 Report Error

The average age of 4 boys is 16 years. If their ages are in ratio 1:2:3:4, what is the age of the oldest boy?

A. 28

B. 25.6 years

C. 24

D. 26

View Answer & Solution Discuss

Correct Answer: Option B

Explanation:
Sum =4×16=64. Ratio sum=10. Oldest = (4/10)×64 =25.6.

This question belongs to: Maths Average

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