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. 27

B. 25

C. 24

D. 22.5

Answer: Option C

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 marks of 25 students 60. If marks of one 80 included instead of 40, new average?

A. 61.6

B. 60

C. 61

D. 62

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Correct Answer: Option A

Explanation:
Increase 40, /25=1.6, new 61.6.

This question belongs to: Maths Average

Question #2

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Average of 10,15,20,25,30 is

A. 25

B. 18

C. 22

D. 20

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Correct Answer: Option D

Explanation:
100/5=20.

This question belongs to: Maths Average

Question #3

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The average of 3 numbers is 20. If the numbers are in the ratio 1:2:3, find the largest.

A. 30

B. 25

C. 20

D. 35

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Correct Answer: Option A

Explanation:
Sum=3×20=60. Ratio sum=6. Largest = (3/6)×60=30.

This question belongs to: Maths Average

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