Average of 15 numbers 1510. If average of 9 is 1505, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 1510. If average of 9 is 1505, average of remaining 6?

A. 1517.5

B. 1520

C. 1515

D. 1518

Answer: Option A

Solution (By JKExamLibrary)

Sum15=22650. Sum9=13545. Remaining=9105. Average=1517.5.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 10 numbers is 22. If each number is decreased by 2, what is the new average?

A. 24

B. 22

C. 18

D. 20

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Correct Answer: Option D

Explanation:
New average =22-2=20.

This question belongs to: Maths Average

Question #2 Report Error

What is the average of all numbers from 1 to 30 that are divisible by 6?

A. 17

B. 18.5

C. 17.5

D. 18

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Correct Answer: Option D

Explanation:
Numbers:6,12,18,24,30 sum=90, count=5, avg=18.

This question belongs to: Maths Average

Question #3 Report Error

Average of 8 numbers 1200. If average of 5 is 1195, average of remaining 3?

A. 1210

B. 1205

C. 1207

D. 1208.33

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Correct Answer: Option D

Explanation:
Sum8=9600. Sum5=5975. Remaining=3625. Average≈1208.33.

This question belongs to: Maths Average

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