Average of 10 numbers 580. If average of 6 is 575, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 580. If average of 6 is 575, average of remaining 4?

A. 586

B. 585

C. 590

D. 587.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum10=5800. Sum6=3450. Remaining=2350. Average=587.5.

This question belongs to: Maths Average

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Question #1

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The average of 5 numbers is 31. If each number is multiplied by 2 and then 4 is added, what is the new average?

A. 62

B. 68

C. 64

D. 66

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Correct Answer: Option D

Explanation:
New average = (31×2)+4 =62+4=66.

This question belongs to: Maths Average

Question #2

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Average of 15 numbers 2410. If average of 9 is 2405, average of remaining 6?

A. 2420

B. 2415

C. 2417.5

D. 2418

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Correct Answer: Option C

Explanation:
Sum15=36150. Sum9=21645. Remaining=14505. Average=2417.5.

This question belongs to: Maths Average

Question #3

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Average of 12 numbers 1870. If average of 8 is 1865, average of remaining 4?

A. 1878

B. 1875

C. 1880

D. 1882

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Correct Answer: Option C

Explanation:
Sum12=22440. Sum8=14920. Remaining=7520. Average=1880.

This question belongs to: Maths Average

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