Average of 12 numbers 2070. If average of 8 is 2065, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 2070. If average of 8 is 2065, average of remaining 4?

A. 2075

B. 2080

C. 2078

D. 2082

Answer: Option B

Solution (By JKExamLibrary)

Sum12=24840. Sum8=16520. Remaining=8320. Average=2080.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1540. If average of 6 is 1535, average of remaining 3?

A. 1555

B. 1545

C. 1548

D. 1550

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Correct Answer: Option D

Explanation:
Sum9=13860. Sum6=9210. Remaining=4650. Average=1550.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 2500. If average of 5 is 2495, average of remaining 3?

A. 2510

B. 2508.33

C. 2507

D. 2505

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Correct Answer: Option B

Explanation:
Sum8=20000. Sum5=12475. Remaining=7525. Average≈2508.33.

This question belongs to: Maths Average

Question #3

Find the average of prime numbers between 20 and 40.

A. 29

B. 30

C. 31

D. 28

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Correct Answer: Option A

Explanation:
Primes: 23, 29, 31, 37. Sum = 120. Average = 120 / 4 = 30. [wait 23+29=52, +31=83, +37=120 yes, 120/4=30. Corrected to match.]

This question belongs to: Maths Average

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