Average of 15 numbers 38. If one number 50 replaced by 20, new average? MCQ with Answer and Explanation

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

A. 35

B. 36.67

C. 37

D. 36

Answer: Option B

Solution (By JKExamLibrary)

Change -30, decrease 2. New≈36.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 150,200,250 is

A. 210

B. 195

C. 190

D. 200

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Correct Answer: Option D

Explanation:
600/3=200.

This question belongs to: Maths Average

Question #2 Report Error

Average of 9 numbers 390. If average of 6 is 385, average of remaining 3?

A. 400

B. 398

C. 405

D. 395

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Correct Answer: Option A

Explanation:
Sum9=3510. Sum6=2310. Remaining=1200. Average=400.

This question belongs to: Maths Average

Question #3 Report Error

A group of 5 friends average age 25. If one leaves, average becomes 24. Age of person who left?

A. 31

B. 30

C. 29

D. 28

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Correct Answer: Option C

Explanation:
Sum5=125. Sum4=96. Left=29.

This question belongs to: Maths Average

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