If the average of a,b,c,d is 30 and average of a,b is 25, average of c,d is MCQ with Answer and Explanation

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If the average of a,b,c,d is 30 and average of a,b is 25, average of c,d is

A. 35

B. 28

C. 30

D. 32

Answer: Option A

Solution (By JKExamLibrary)

a+b+c+d =120. a+b=50. c+d=70. Average c,d =35.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 10 numbers 1580. If average of 6 is 1575, average of remaining 4?

A. 1590

B. 1585

C. 1587.5

D. 1586

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Correct Answer: Option C

Explanation:
Sum10=15800. Sum6=9450. Remaining=6350. Average=1587.5.

This question belongs to: Maths Average

Question #2 Report Error

Average of 7 numbers 55. If average of 4 is 50, average of remaining 3?

A. 60

B. 62.33

C. 58

D. 65

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Correct Answer: Option B

Explanation:
Sum7=385. Sum4=200. Remaining=185. Average≈61.67 approx 62.

This question belongs to: Maths Average

Question #3 Report Error

Average of 12 numbers 670. If average of 8 is 665, average of remaining 4?

A. 678

B. 675

C. 680

D. 682

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Correct Answer: Option C

Explanation:
Sum12=8040. Sum8=5320. Remaining=2720. Average=680.

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