Average of 12 numbers 1820. If average of 8 is 1815, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1820. If average of 8 is 1815, average of remaining 4?

A. 1832

B. 1825

C. 1830

D. 1828

Answer: Option C

Solution (By JKExamLibrary)

Sum12=21840. Sum8=14520. Remaining=7320. Average=1830.

This question belongs to: Maths Average

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Question #1

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The average salary of 10 employees is Rs 5000. If a new employee joins with salary Rs 7000, what is the new average?

A. 5200

B. 5181.82

C. 5150

D. 5220

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Correct Answer: Option B

Explanation:
Total =10×5000=50000. New total =57000. New average =57000/11=5181.82.

This question belongs to: Maths Average

Question #2

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The average of 3 numbers is 24. If one number is 12 and another is 30, find the third.

A. 30

B. 36

C. 24

D. 18

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Correct Answer: Option A

Explanation:
Sum=3×24=72. Third =72-12-30=30.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 2130. If average of 6 is 2125, average of remaining 4?

A. 2137.5

B. 2135

C. 2140

D. 2136

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Correct Answer: Option A

Explanation:
Sum10=21300. Sum6=12750. Remaining=8550. Average=2137.5.

This question belongs to: Maths Average

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