Average of 10 numbers 1380. If average of 6 is 1375, average of remaining 4? MCQ with Answer and Explanation

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Average of 10 numbers 1380. If average of 6 is 1375, average of remaining 4?

A. 1385

B. 1390

C. 1387.5

D. 1386

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum10=13800. Sum6=8250. Remaining=5550. Average=1387.5.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1690. If average of 6 is 1685, average of remaining 3?

A. 1695

B. 1700

C. 1705

D. 1698

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Correct Answer: Option B

Explanation:
Sum9=15210. Sum6=10110. Remaining=5100. Average=1700.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 1450. If average of 5 is 1445, average of remaining 3?

A. 1458.33

B. 1455

C. 1457

D. 1460

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Correct Answer: Option A

Explanation:
Sum8=11600. Sum5=7225. Remaining=4375. Average≈1458.33.

This question belongs to: Maths Average

Question #3

Average of 100 numbers is 50. If 50 is added to each, new average is

A. 100

B. 50

C. 75

D. 150

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Correct Answer: Option A

Explanation:
New average =50 +50=100.

This question belongs to: Maths Average

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