Average of 8 numbers 300. If average of 5 is 295, average of remaining 3? MCQ with Answer and Explanation

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Average of 8 numbers 300. If average of 5 is 295, average of remaining 3?

A. 308.33

B. 310

C. 305

D. 307

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum8=2400. Sum5=1475. Remaining=925. Average≈308.33.

This question belongs to: Maths Average

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Question #1

Average weight of 40 students 45 kg. If 10 more with average 50 kg join, new average?

A. 45

B. 46

C. 46.25

D. 47

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Correct Answer: Option B

Explanation:
Total old=1800. New=500. Total 2300 for 50. Average=46.

This question belongs to: Maths Average

Question #2

The average of first 6 multiples of 7 is

A. 21

B. 24.5

C. 25

D. 28

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Correct Answer: Option B

Explanation:
7*(1+6)/2=7*3.5=24.5.

This question belongs to: Maths Average

Question #3

Average of 8 numbers is 25. If 3 is added to each number, what will be the new average?

A. 26

B. 27

C. 28

D. 25

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Correct Answer: Option C

Explanation:
When a constant is added to each number, the average also increases by the same constant. New average = 25 + 3 = 28.

This question belongs to: Maths Average

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