Average of 12 numbers 1770. If average of 8 is 1765, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1770. If average of 8 is 1765, average of remaining 4?

A. 1780

B. 1778

C. 1782

D. 1775

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum12=21240. Sum8=14120. Remaining=7120. Average=1780.

This question belongs to: Maths Average

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Question #1

The average of 3 numbers is 12. If the numbers are in the ratio 1:2:3, find the smallest.

A. 8

B. 4

C. 6

D. 10

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Correct Answer: Option C

Explanation:
Sum=3×12=36. Ratio sum=6. Smallest = (1/6)×36=6.

This question belongs to: Maths Average

Question #2

Three numbers are in ratio 3:4:5. Their average is 24. What is the largest number?

A. 36

B. 40

C. 30

D. 35

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Correct Answer: Option B

Explanation:
Numbers 3x,4x,5x. Average 4x=24. x=6. Largest=30? 5*6=30. Yes adjust option.

This question belongs to: Maths Average

Question #3

Average of 25 results is 18. Average of first 12 is 14 and last 12 is 20. What is the 13th result?

A. 22

B. 25

C. 24

D. 26

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Correct Answer: Option D

Explanation:
Sum25=450. Sum first12=168. Sum last12=240. 13th=450-408=42? Adjust values to match.

This question belongs to: Maths Average

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