Find the average of the first 6 multiples of 3. MCQ with Answer and Explanation

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Find the average of the first 6 multiples of 3.

A. 11

B. 10

C. 10.5

D. 9.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Multiples:3,6,9,12,15,18 sum=63, count=6, avg=10.5.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 1040. If average of 6 is 1035, average of remaining 3?

A. 1048

B. 1045

C. 1055

D. 1050

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Correct Answer: Option D

Explanation:
Sum9=9360. Sum6=6210. Remaining=3150. Average=1050.

This question belongs to: Maths Average

Question #2

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Average of 8 numbers 800. If average of 5 is 795, average of remaining 3?

A. 808.33

B. 810

C. 805

D. 807

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Correct Answer: Option A

Explanation:
Sum8=6400. Sum5=3975. Remaining=2425. Average≈808.33.

This question belongs to: Maths Average

Question #3

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The average of 7 numbers is 39. If one number is 48, find the average of the remaining 6.

A. 38

B. 37

C. 36.5

D. 37.5

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Correct Answer: Option D

Explanation:
Sum=7×39=273. Remaining sum=273-48=225. Avg=225/6=37.5.

This question belongs to: Maths Average

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