Average of even numbers between 1 and 31 is MCQ with Answer and Explanation

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Average of even numbers between 1 and 31 is

A. 18

B. 15

C. 17

D. 16

Answer: Option D

Solution (By JKSSB Mock Tests)

2 to 30, 15 numbers. Average (2+30)/2=16.

This question belongs to: Maths Average

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Question #1

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The average of 50 numbers is 38. If 48 is replaced by 78, new average?

A. 37

B. 38

C. 39

D. 38.6

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Correct Answer: Option D

Explanation:
Change +30, increase 30/50=0.6. New=38.6.

This question belongs to: Maths Average

Question #2

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Average of 10 numbers 2330. If average of 6 is 2325, average of remaining 4?

A. 2335

B. 2340

C. 2336

D. 2337.5

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Correct Answer: Option D

Explanation:
Sum10=23300. Sum6=13950. Remaining=9350. Average=2337.5.

This question belongs to: Maths Average

Question #3

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The average of 5 numbers is 28. If one number is 34, find the average of the remaining 4.

A. 26

B. 27

C. 26.5

D. 25.5

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Correct Answer: Option C

Explanation:
Sum=5×28=140. Remaining sum=140-34=106. Avg=106/4=26.5.

This question belongs to: Maths Average

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