Average of 15 numbers 2210. If average of 9 is 2205, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2210. If average of 9 is 2205, average of remaining 6?

A. 2220

B. 2218

C. 2215

D. 2217.5

Answer: Option D

Solution (By JKExamLibrary)

Sum15=33150. Sum9=19845. Remaining=13305. Average=2217.5.

This question belongs to: Maths Average

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Question #1

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

A. 10.5

B. 10

C. 9

D. 9.5

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Correct Answer: Option B

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

Question #2

Average of 25 numbers 42. If one number 60 replaced by 30, new average?

A. 43

B. 40

C. 42

D. 41

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Correct Answer: Option D

Explanation:
Change -30, decrease 1.2, new 40.8 approx 41.

This question belongs to: Maths Average

Question #3

Three numbers are in ratio 3:4:5. Their average is 24. What is the largest number?

A. 40

B. 30

C. 36

D. 35

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Correct Answer: Option A

Explanation:
Numbers 3x,4x,5x. Average 4x=24. x=6. Largest=30? 5*6=30. Yes adjust option.

This question belongs to: Maths Average

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