Average of 12 numbers 1070. If average of 8 is 1065, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1070. If average of 8 is 1065, average of remaining 4?

A. 1082

B. 1078

C. 1075

D. 1080

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum12=12840. Sum8=8520. Remaining=4320. Average=1080.

This question belongs to: Maths Average

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Question #1

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The average age of husband and wife was 25 years 5 years ago. What will be their average age 5 years from now?

A. 25

B. 35

C. 40

D. 30

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Correct Answer: Option B

Explanation:
5 years ago average 25, so current average 30. 5 years later average =30+5=35.

This question belongs to: Maths Average

Question #2

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Average of 9 numbers 1090. If average of 6 is 1085, average of remaining 3?

A. 1095

B. 1098

C. 1105

D. 1100

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Correct Answer: Option D

Explanation:
Sum9=9810. Sum6=6510. Remaining=3300. Average=1100.

This question belongs to: Maths Average

Question #3

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The average of 30 numbers is 25. If 5 numbers with average 30 are added, new average?

A. 27

B. 25

C. 25.71

D. 26

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Correct Answer: Option C

Explanation:
Total30=750. Added=150. Total900. Numbers35. Average≈25.71.

This question belongs to: Maths Average

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