Average of 9 numbers 2390. If average of 6 is 2385, average of remaining 3? MCQ with Answer and Explanation

Average of 9 numbers 2390. If average of 6 is 2385, average of remaining 3?

A. 2395

B. 2400

C. 2405

D. 2398

Answer: Option B

Sum9=21510. Sum6=14310. Remaining=7200. Average=2400.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 3 numbers is 26. If the numbers are in the ratio 1:3:5, find the middle number.

A. 24

B. 26

C. 22

D. 28

Correct Answer: Option B

Explanation:
Sum=3×26=78. Ratio sum=1+3+5=9. Middle = (3/9)×78=26.

This question belongs to: Maths Average

Question #2 Report Error

What is the average of all odd numbers from 1 to 29?

A. 14.5

B. 14

C. 15

D. 15.5

Correct Answer: Option C

Explanation:
Odd numbers 1 to 29: 15 terms. Sum = n^2 =15^2=225. Average=225/15=15.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers 2680. If average of 6 is 2675, average of remaining 4?

A. 2685

B. 2686

C. 2690

D. 2687.5

Correct Answer: Option D

Explanation:
Sum10=26800. Sum6=16050. Remaining=10750. Average=2687.5.

This question belongs to: Maths Average