Average of 12 numbers 2020. If average of 8 is 2015, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 2020. If average of 8 is 2015, average of remaining 4?

A. 2032

B. 2028

C. 2030

D. 2025

Answer: Option C

Solution (By JKExamLibrary)

Sum12=24240. Sum8=16120. Remaining=8120. Average=2030.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 10 numbers 230. If average of 6 is 225, average of remaining 4?

A. 240

B. 235

C. 236

D. 237.5

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Correct Answer: Option D

Explanation:
Sum10=2300. Sum6=1350. Remaining=950. Average=237.5.

This question belongs to: Maths Average

Question #2 Report Error

Find the average of all numbers divisible by 5 between 10 and 30 (inclusive).

A. 20

B. 17.5

C. 20.5

D. 22.5

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Correct Answer: Option A

Explanation:
Numbers: 10,15,20,25,30 sum=100, count=5, avg=20.

This question belongs to: Maths Average

Question #3 Report Error

What is the average of all odd numbers from 1 to 19?

A. 9.5

B. 9

C. 10

D. 10.5

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Correct Answer: Option C

Explanation:
Odd numbers: 1,3,5,...,19. There are 10 terms. Sum = n^2 =10^2=100. Average=100/10=10.

This question belongs to: Maths Average

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