Average of 12 numbers is 40. If average of first 7 is 38, what is average of last 5? MCQ with Answer and Explanation

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Average of 12 numbers is 40. If average of first 7 is 38, what is average of last 5?

A. 43

B. 44

C. 40

D. 42

Answer: Option A

Solution (By JKExamLibrary)

Sum12=480. Sum first7=266. Sum last5=214. Average last5=42.8 ≈ but use exact numbers.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 15 numbers 2610. If average of 9 is 2605, average of remaining 6?

A. 2620

B. 2617.5

C. 2615

D. 2618

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Correct Answer: Option B

Explanation:
Sum15=39150. Sum9=23445. Remaining=15705. Average=2617.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 25 numbers 85. If average of 15 is 90, average of remaining 10?

A. 80

B. 77.5

C. 75

D. 78

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Correct Answer: Option B

Explanation:
Total=2125. Sum15=1350. Remaining=775/10=77.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers 1330. If average of 6 is 1325, average of remaining 4?

A. 1335

B. 1340

C. 1336

D. 1337.5

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Correct Answer: Option D

Explanation:
Sum10=13300. Sum6=7950. Remaining=5350. Average=1337.5.

This question belongs to: Maths Average

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