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

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Find the average of the first 5 multiples of 6.

A. 15

B. 16

C. 18

D. 20

Answer: Option C

Solution (By JKSSB Mock Tests)

Multiples:6,12,18,24,30 sum=90, count=5, avg=18.

This question belongs to: Maths Average

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Question #1

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If average of a and b is 10, b and c is 15, c and a is 20, average of a,b,c is

A. 14

B. 15

C. 16

D. 13

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Correct Answer: Option B

Explanation:
Adding all: 2(a+b+c)=90, a+b+c=45. Average=15.

This question belongs to: Maths Average

Question #2

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Average of 1335,1780,2225 is

A. 1770

B. 1775

C. 1790

D. 1780

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Correct Answer: Option D

Explanation:
5340/3=1780.

This question belongs to: Maths Average

Question #3

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The average of 10 numbers is 16. If each number is increased by 4, what is the new average?

A. 20

B. 12

C. 24

D. 16

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Correct Answer: Option A

Explanation:
New average =16+4=20.

This question belongs to: Maths Average

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