Average of 9 numbers 2140. If average of 6 is 2135, average of remaining 3? MCQ with Answer and Explanation

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Average of 9 numbers 2140. If average of 6 is 2135, average of remaining 3?

A. 2148

B. 2145

C. 2155

D. 2150

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum9=19260. Sum6=12810. Remaining=6450. Average=2150.

This question belongs to: Maths Average

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Question #1

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The average marks of 20 students is 75. If a student with 90 marks leaves, what is the new average?

A. 75.0

B. 73.5

C. 74.21

D. 74.0

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Correct Answer: Option C

Explanation:
Sum=20×75=1500. New sum=1500-90=1410. New average=1410/19=74.21.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 1770. If average of 8 is 1765, average of remaining 4?

A. 1778

B. 1782

C. 1780

D. 1775

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Correct Answer: Option C

Explanation:
Sum12=21240. Sum8=14120. Remaining=7120. Average=1780.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 28. If average of 6 is 25, average of remaining 4?

A. 30

B. 32.5

C. 33

D. 35

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Correct Answer: Option B

Explanation:
Sum10=280. Sum6=150. Remaining=130. Average=32.5.

This question belongs to: Maths Average

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