Average of 12 numbers 2270. If average of 8 is 2265, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 2270. If average of 8 is 2265, average of remaining 4?

A. 2282

B. 2280

C. 2275

D. 2278

Answer: Option B

Solution (By JKExamLibrary)

Sum12=27240. Sum8=18120. Remaining=9120. Average=2280.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 9 numbers is 50. If one number is 70, find the average of the remaining 8.

A. 47

B. 46.5

C. 48

D. 47.5

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Correct Answer: Option D

Explanation:
Sum=9×50=450. Remaining sum=450-70=380. Avg=380/8=47.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 8 numbers 200. If average of 5 is 195, average of remaining 3?

A. 208.33

B. 205

C. 207

D. 210

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Correct Answer: Option A

Explanation:
Sum8=1600. Sum5=975. Remaining=625. Average≈208.33.

This question belongs to: Maths Average

Question #3 Report Error

Average salary of 20 employees Rs. 8000. If manager Rs. 20000 included, new average?

A. 9000

B. 8200

C. 8800

D. 8500

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Correct Answer: Option D

Explanation:
Total=160000. New total=180000. /21≈8571 approx 8500.

This question belongs to: Maths Average

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