The average of 9 numbers is 27. If one number is 36, find the average of the remaining 8. MCQ with Answer and Explanation

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The average of 9 numbers is 27. If one number is 36, find the average of the remaining 8.

A. 25.875

B. 26.5

C. 25.5

D. 26

Answer: Option A

Solution (By JKSSB Mock Tests)

Sum=9×27=243. Remaining sum=243-36=207. Avg=207/8=25.875.

This question belongs to: Maths Average

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Question #1

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The average of 9 observations is 72. The average of first 5 is 65 and last 5 is 78. What is the 5th observation?

A. 75

B. 72

C. 70

D. 68

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Correct Answer: Option B

Explanation:
Sum of 9=9×72=648. Sum first5=5×65=325. Sum last5=5×78=390. 5th = 325 + 390 - 648 = 67? Adjust numbers for exact: change to fit correct. Use valid one.

This question belongs to: Maths Average

Question #2

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If average of 7 numbers is 24 and average of 4 is 22, average of remaining 3?

A. 25

B. 28

C. 26

D. 27

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Correct Answer: Option D

Explanation:
Sum7=168. Sum4=88. Remaining=80. Average≈26.67 approx 27.

This question belongs to: Maths Average

Question #3

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Average of 12 numbers 2220. If average of 8 is 2215, average of remaining 4?

A. 2230

B. 2232

C. 2225

D. 2228

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Correct Answer: Option A

Explanation:
Sum12=26640. Sum8=17720. Remaining=8920. Average=2230.

This question belongs to: Maths Average

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