Average of 5,10,15,20,25,30,35,40 is MCQ with Answer and Explanation

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Average of 5,10,15,20,25,30,35,40 is

A. 25

B. 22.5

C. 23

D. 20

Answer: Option B

Solution (By JKSSB Mock Tests)

180/8=22.5.

This question belongs to: Maths Average

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Question #1

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The average of 6 numbers is 14. If each number is divided by 2, what is the new average?

A. 8

B. 7

C. 9

D. 6

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Correct Answer: Option B

Explanation:
New average =14/2=7.

This question belongs to: Maths Average

Question #2

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The average of first 15 multiples of 3 is

A. 22.5

B. 24

C. 27

D. 25

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Correct Answer: Option B

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

This question belongs to: Maths Average

Question #3

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The average weight of 6 persons is 65 kg. If a person weighing 80 kg joins, what is the new average?

A. 68 kg

B. 67.14 kg

C. 67.5 kg

D. 66.67 kg

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Correct Answer: Option B

Explanation:
Sum=6×65=390. New sum=390+80=470. New avg=470/7=67.14.

This question belongs to: Maths Average

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