Average of 15 numbers 50. If average of 10 is 55, average of remaining 5? MCQ with Answer and Explanation

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Average of 15 numbers 50. If average of 10 is 55, average of remaining 5?

A. 35

B. 40

C. 45

D. 42

Answer: Option B

Solution (By JKExamLibrary)

Sum15=750. Sum10=550. Remaining=200. Average=40.

This question belongs to: Maths Average

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Question #1 Report Error

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

A. 44

B. 43

C. 42

D. 40

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Correct Answer: Option B

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

This question belongs to: Maths Average

Question #2 Report Error

Average of 15 numbers 2110. If average of 9 is 2105, average of remaining 6?

A. 2117.5

B. 2115

C. 2120

D. 2118

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Correct Answer: Option A

Explanation:
Sum15=31650. Sum9=18945. Remaining=12705. Average=2117.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 8 numbers 350. If average of 5 is 345, average of remaining 3?

A. 360

B. 355

C. 357

D. 358.33

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Correct Answer: Option D

Explanation:
Sum8=2800. Sum5=1725. Remaining=1075. Average≈358.33.

This question belongs to: Maths Average

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