Average of 10 numbers 2280. If average of 6 is 2275, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 2280. If average of 6 is 2275, average of remaining 4?

A. 2285

B. 2287.5

C. 2290

D. 2286

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum10=22800. Sum6=13650. Remaining=9150. Average=2287.5.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1640. If average of 6 is 1635, average of remaining 3?

A. 1645

B. 1655

C. 1650

D. 1648

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Correct Answer: Option C

Explanation:
Sum9=14760. Sum6=9810. Remaining=4950. Average=1650.

This question belongs to: Maths Average

Question #2

The average of 15 observations is 20. If each observation is increased by 3, what is the new average?

A. 23

B. 20

C. 17

D. 30

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Correct Answer: Option A

Explanation:
New average = old average + increase =20+3=23.

This question belongs to: Maths Average

Question #3

If average of 9 numbers is 30 and average of 6 is 28, average of remaining 3?

A. 33

B. 32

C. 35

D. 34

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Correct Answer: Option D

Explanation:
Sum9=270. Sum6=168. Remaining=102. Average=34.

This question belongs to: Maths Average

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