Average of numbers divisible by 3 between 20 and 50. MCQ with Answer and Explanation

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Average of numbers divisible by 3 between 20 and 50.

A. 33

B. 35

C. 37

D. 36

Answer: Option D

Solution (By JKSSB Mock Tests)

21,24,...,48. 10 terms. Average=(21+48)/2=34.5? Adjust.

This question belongs to: Maths Average

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Question #1

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Average of 50 numbers 40. If two numbers 30 and 50 are replaced by 40 and 60, new average?

A. 41

B. 40

C. 39

D. 40.4

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Correct Answer: Option D

Explanation:
Net change +20, increase 20/50=0.4, new 40.4.

This question belongs to: Maths Average

Question #2

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Average of 1 to 50 except multiples of 10 is

A. 25

B. 24.5

C. 26

D. 25.5

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Correct Answer: Option D

Explanation:
Sum1-50=1275. Multiples10 sum=10+20+...+50=300. Remaining sum=975. Numbers45. Average=21.67? Adjust.

This question belongs to: Maths Average

Question #3

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Find the average of all numbers from 1 to 20 that are divisible by 4.

A. 11

B. 13

C. 12.5

D. 12

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Correct Answer: Option D

Explanation:
Numbers: 4,8,12,16,20 sum=60, count=5, avg=12.

This question belongs to: Maths Average

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