What is the average of all even numbers from 2 to 30? MCQ with Answer and Explanation

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What is the average of all even numbers from 2 to 30?

A. 16.5

B. 16

C. 15

D. 15.5

Answer: Option B

Solution (By JKSSB Mock Tests)

Even numbers: 2 to 30 inclusive. Number of terms = (30-2)/2+1=15. Sum = n/2*(first+last) =15/2*(2+30)=15/2*32=240. Average=240/15=16.

This question belongs to: Maths Average

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Question #1

Average of 9 numbers 1340. If average of 6 is 1335, average of remaining 3?

A. 1348

B. 1345

C. 1355

D. 1350

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Correct Answer: Option D

Explanation:
Sum9=12060. Sum6=8010. Remaining=4050. Average=1350.

This question belongs to: Maths Average

Question #2

Average of 8 numbers 350. If average of 5 is 345, average of remaining 3?

A. 360

B. 355

C. 358.33

D. 357

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Correct Answer: Option C

Explanation:
Sum8=2800. Sum5=1725. Remaining=1075. Average≈358.33.

This question belongs to: Maths Average

Question #3

If average of 8 numbers is 25 and average of 5 is 20, average of remaining 3 is

A. 33.33

B. 35

C. 30

D. 32

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Correct Answer: Option A

Explanation:
Sum8=200. Sum5=100. Remaining sum=100. Average=100/3≈33.33.

This question belongs to: Maths Average

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