Average of 6 numbers is 8.5. If two numbers 12 and 15 are added, what is the new average? MCQ with Answer and Explanation

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Average of 6 numbers is 8.5. If two numbers 12 and 15 are added, what is the new average?

A. 9.75

B. 9

C. 10

D. 9.5

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum of 6=51. New sum=51+12+15=78. Numbers=8. Average=78/8=9.75.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Average of 15 numbers 2610. If average of 9 is 2605, average of remaining 6?

A. 2617.5

B. 2615

C. 2618

D. 2620

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Correct Answer: Option A

Explanation:
Sum15=39150. Sum9=23445. Remaining=15705. Average=2617.5.

This question belongs to: Maths Average

Question #2

The average of 1380,1840,2300 is

A. 1830

B. 1850

C. 1840

D. 1835

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Correct Answer: Option C

Explanation:
5520/3=1840.

This question belongs to: Maths Average

Question #3

The average marks of 12 students is 72. If a student with 88 marks leaves, what is the new average?

A. 71

B. 70.55

C. 70

D. 71.5

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Correct Answer: Option B

Explanation:
Sum=12×72=864. New sum=864-88=776. New avg=776/11=70.545≈70.55.

This question belongs to: Maths Average

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