Average income of 10 persons is Rs. 5000. If one leaves, average becomes Rs. 4800. Income of the person who left? MCQ with Answer and Explanation

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Average income of 10 persons is Rs. 5000. If one leaves, average becomes Rs. 4800. Income of the person who left?

A. 7000

B. 6800

C. 6500

D. 7200

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum10=50000. Sum9=43200. Left=6800.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 640. If average of 6 is 635, average of remaining 3?

A. 645

B. 655

C. 650

D. 648

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Correct Answer: Option C

Explanation:
Sum9=5760. Sum6=3810. Remaining=1950. Average=650.

This question belongs to: Maths Average

Question #2

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Average of 8 numbers 2100. If average of 5 is 2095, average of remaining 3?

A. 2108.33

B. 2107

C. 2105

D. 2110

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Correct Answer: Option A

Explanation:
Sum8=16800. Sum5=10475. Remaining=6325. Average≈2108.33.

This question belongs to: Maths Average

Question #3

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The average marks in English for 30 students 55. If 10 students average 65, average of remaining?

A. 50

B. 48

C. 52

D. 55

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Correct Answer: Option A

Explanation:
Total=1650. 10 students=650. Remaining=1000 for 20. 50.

This question belongs to: Maths Average

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