Average of 8 numbers 250. If average of 5 is 245, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 250. If average of 5 is 245, average of remaining 3?

A. 260

B. 255

C. 257

D. 258.33

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum8=2000. Sum5=1225. Remaining=775. Average≈258.33.

This question belongs to: Maths Average

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Question #1

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The average age of husband and wife was 25 years 5 years ago. What will be their average age 5 years from now?

A. 35

B. 25

C. 30

D. 40

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Correct Answer: Option A

Explanation:
5 years ago average 25, so current average 30. 5 years later average =30+5=35.

This question belongs to: Maths Average

Question #2

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The average of 9 numbers is 30. If each number is increased by 2, what is the new average?

A. 30

B. 28

C. 34

D. 32

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Correct Answer: Option D

Explanation:
New average =30+2=32.

This question belongs to: Maths Average

Question #3

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The average of 3 numbers is 26. If the numbers are in the ratio 1:3:5, find the middle number.

A. 22

B. 26

C. 24

D. 28

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Correct Answer: Option B

Explanation:
Sum=3×26=78. Ratio sum=1+3+5=9. Middle = (3/9)×78=26.

This question belongs to: Maths Average

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