Average of 50 numbers is 38. The number 45 was wrongly written as 54. Correct average? MCQ with Answer and Explanation

Question Report Error

Average of 50 numbers is 38. The number 45 was wrongly written as 54. Correct average?

A. 37.82

B. 37.8

C. 38

D. 39

Answer: Option A

Solution (By JKExamLibrary)

Error +9, decrease 9/50=0.18, correct average=38-0.18=37.82.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1 Report Error

Average of 15 numbers 610. If average of 9 is 605, average of remaining 6?

A. 615

B. 618

C. 617.5

D. 620

View Answer & Solution Discuss

Correct Answer: Option C

Explanation:
Sum15=9150. Sum9=5445. Remaining=3705. Average=617.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 9 numbers 340. If average of 6 is 335, average of remaining 3?

A. 350

B. 355

C. 348

D. 345

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Correct Answer: Option A

Explanation:
Sum9=3060. Sum6=2010. Remaining=1050. Average=350.

This question belongs to: Maths Average

Question #3 Report Error

The average of 5 numbers is 28. If one number is 34, find the average of the remaining 4.

A. 26.5

B. 27

C. 26

D. 25.5

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Correct Answer: Option A

Explanation:
Sum=5×28=140. Remaining sum=140-34=106. Avg=106/4=26.5.

This question belongs to: Maths Average

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