Average of 12 numbers 2220. If average of 8 is 2215, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 2220. If average of 8 is 2215, average of remaining 4?

A. 2228

B. 2232

C. 2230

D. 2225

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=26640. Sum8=17720. Remaining=8920. Average=2230.

This question belongs to: Maths Average

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Question #1

Average of 12 numbers 2720. If average of 8 is 2715, average of remaining 4?

A. 2732

B. 2728

C. 2725

D. 2730

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Correct Answer: Option D

Explanation:
Sum12=32640. Sum8=21720. Remaining=10920. Average=2730.

This question belongs to: Maths Average

Question #2

The average of 5 numbers is 32. If one number is excluded, the average becomes 30. Find the excluded number.

A. 36

B. 40

C. 38

D. 42

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Correct Answer: Option B

Explanation:
Sum of 5 =160. Sum of 4=4×30=120. Excluded=160-120=40.

This question belongs to: Maths Average

Question #3

The average of 9 numbers is 35. If average of first 4 is 32, average of last 6 is 37, the 4th number?

A. 35

B. 33

C. 36

D. 34

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Correct Answer: Option B

Explanation:
Sum9=315. Sum1-4=128. Sum4-9=222. 4th=128+222-315=35.

This question belongs to: Maths Average

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