The average of first 15 multiples of 3 is MCQ with Answer and Explanation

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The average of first 15 multiples of 3 is

A. 24

B. 22.5

C. 27

D. 25

Answer: Option A

Solution (By JKSSB Mock Tests)

3*(1+15)/2 =3*8=24.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 2590. If average of 6 is 2585, average of remaining 3?

A. 2598

B. 2605

C. 2595

D. 2600

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Correct Answer: Option D

Explanation:
Sum9=23310. Sum6=15510. Remaining=7800. Average=2600.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 55. If average of 8 is 50, average of remaining 4?

A. 60

B. 70

C. 65

D. 62.5

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Correct Answer: Option C

Explanation:
Sum12=660. Sum8=400. Remaining=260. Average=65.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 190. If average of 6 is 185, average of remaining 4?

A. 200

B. 195

C. 197.5

D. 196

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Correct Answer: Option C

Explanation:
Sum10=1900. Sum6=1110. Remaining=790. Average=197.5.

This question belongs to: Maths Average

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