Average of 45,60,75,90 is MCQ with Answer and Explanation

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Average of 45,60,75,90 is

A. 70

B. 68

C. 65

D. 67.5

Answer: Option D

Solution (By JKSSB Mock Tests)

270/4=67.5.

This question belongs to: Maths Average

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Question #1

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Find the average of the first 6 multiples of 5.

A. 18

B. 16.5

C. 17.5

D. 17

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Correct Answer: Option C

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

This question belongs to: Maths Average

Question #2

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Average of 30 numbers 25. If each number is increased by 10%, new average?

A. 25

B. 30

C. 26

D. 27.5

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Correct Answer: Option D

Explanation:
Increased by 10%, average 27.5.

This question belongs to: Maths Average

Question #3

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The average weight of 6 boys is 50 kg. If a new boy weighing 60 kg joins, what is the new average?

A. 50.5 kg

B. 52 kg

C. 51 kg

D. 51.43 kg

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Correct Answer: Option D

Explanation:
Sum=6×50=300. New sum=300+60=360. New avg=360/7=51.43.

This question belongs to: Maths Average

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