Find the average of all numbers from 1 to 15 that are divisible by 3. MCQ with Answer and Explanation

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Find the average of all numbers from 1 to 15 that are divisible by 3.

A. 12

B. 9

C. 8

D. 10

Answer: Option B

Solution (By JKSSB Mock Tests)

Numbers: 3,6,9,12,15 sum=45, count=5, avg=9.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 2430. If average of 6 is 2425, average of remaining 4?

A. 2436

B. 2440

C. 2435

D. 2437.5

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Correct Answer: Option D

Explanation:
Sum10=24300. Sum6=14550. Remaining=9750. Average=2437.5.

This question belongs to: Maths Average

Question #2

Average of 25 numbers 60. If 5 numbers average 70, average of remaining 20?

A. 57.5

B. 56

C. 58

D. 55

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Correct Answer: Option A

Explanation:
Total=1500. 5=350. Remaining=1150/20=57.5.

This question belongs to: Maths Average

Question #3

The average of 10 numbers is 19. If each number is increased by 6, what is the new average?

A. 31

B. 19

C. 13

D. 25

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Correct Answer: Option D

Explanation:
New average =19+6=25.

This question belongs to: Maths Average

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