Average of 12 numbers 1120. If average of 8 is 1115, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1120. If average of 8 is 1115, average of remaining 4?

A. 1128

B. 1125

C. 1130

D. 1132

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=13440. Sum8=8920. Remaining=4520. Average=1130.

This question belongs to: Maths Average

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Question #1

Average of 10 numbers 2230. If average of 6 is 2225, average of remaining 4?

A. 2235

B. 2240

C. 2237.5

D. 2236

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Correct Answer: Option C

Explanation:
Sum10=22300. Sum6=13350. Remaining=8950. Average=2237.5.

This question belongs to: Maths Average

Question #2

The average of five numbers is 27. If one number is excluded, the average becomes 25. What is the excluded number?

A. 35

B. 40

C. 30

D. 45

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Correct Answer: Option A

Explanation:
Sum of five numbers = 5 × 27 = 135. Sum of four numbers = 4 × 25 = 100. Excluded number = 135 - 100 = 35.

This question belongs to: Maths Average

Question #3

The average of first 8 multiples of 5 is

A. 30

B. 25

C. 22.5

D. 20

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Correct Answer: Option C

Explanation:
5*(1+8)/2=22.5.

This question belongs to: Maths Average

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