Find the average of the first 6 multiples of 5. MCQ with Answer and Explanation

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Find the average of the first 6 multiples of 5.

A. 17

B. 18

C. 17.5

D. 16.5

Answer: Option C

Solution (By JKSSB Mock Tests)

Multiples:5,10,15,20,25,30 sum=105, count=6, avg=17.5.

This question belongs to: Maths Average

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Question #1

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Average of 30 numbers 55. If average of 20 is 50, average of remaining 10?

A. 70

B. 65

C. 60

D. 62

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Correct Answer: Option B

Explanation:
Sum30=1650. Sum20=1000. Remaining=650. Average=65.

This question belongs to: Maths Average

Question #2

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Average of 10 to 50 is

A. 32

B. 30

C. 29

D. 31

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Correct Answer: Option B

Explanation:
(10+50)/2=30.

This question belongs to: Maths Average

Question #3

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The average of 5 numbers is 18. If 3 numbers average 15, average of remaining 2?

A. 21

B. 20

C. 25

D. 22.5

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Correct Answer: Option D

Explanation:
Sum5=90. Sum3=45. Remaining=45. Average=22.5.

This question belongs to: Maths Average

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