Average of 15 numbers 2310. If average of 9 is 2305, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2310. If average of 9 is 2305, average of remaining 6?

A. 2318

B. 2320

C. 2315

D. 2317.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum15=34650. Sum9=20745. Remaining=13905. Average=2317.5.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

Find the average of the first 10 even numbers.

A. 12

B. 11.5

C. 11

D. 10

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Correct Answer: Option C

Explanation:
Sum of first 10 even numbers = 10×11=110 (since sum = n(n+1) for first n evens? Actually sum = 2+4+...+20 = 2*(1+2+...+10)=2*55=110). Average=110/10=11.

This question belongs to: Maths Average

Question #2

The average of 5 numbers is 29. If one number is 35, find the average of the remaining 4.

A. 28

B. 26.5

C. 27

D. 27.5

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Correct Answer: Option D

Explanation:
Sum=5×29=145. Remaining sum=145-35=110. Avg=110/4=27.5.

This question belongs to: Maths Average

Question #3

Average of 12 numbers 1020. If average of 8 is 1015, average of remaining 4?

A. 1030

B. 1025

C. 1032

D. 1028

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Correct Answer: Option A

Explanation:
Sum12=12240. Sum8=8120. Remaining=4120. Average=1030.

This question belongs to: Maths Average

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