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. 7200

B. 6500

C. 7000

D. 6800

Answer: Option D

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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The average score of a batsman in 11 innings is 48 runs. If his score in the next innings is 70, what becomes his new average?

A. 49.83

B. 51

C. 52

D. 50

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Correct Answer: Option A

Explanation:
Total runs in 11 innings = 11×48 = 528. New total = 528+70 = 598. Average = 598/12 = 49.83.

This question belongs to: Maths Average

Question #2

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A man travels first half distance at 20 km/h, second at 30 km/h. Average speed?

A. 22 km/h

B. 25 km/h

C. 24 km/h

D. 26 km/h

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Correct Answer: Option C

Explanation:
2*20*30/(20+30)=1200/50=24 km/h.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1280. If average of 6 is 1275, average of remaining 4?

A. 1285

B. 1287.5

C. 1286

D. 1290

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Correct Answer: Option B

Explanation:
Sum10=12800. Sum6=7650. Remaining=5150. Average=1287.5.

This question belongs to: Maths Average

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