Average of 12 numbers 1420. If average of 8 is 1415, average of remaining 4? MCQ with Answer and Explanation

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Average of 12 numbers 1420. If average of 8 is 1415, average of remaining 4?

A. 1428

B. 1425

C. 1430

D. 1432

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum12=17040. Sum8=11320. Remaining=5720. Average=1430.

This question belongs to: Maths Average

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Question #1

Average of 30 numbers 25. If each number is increased by 10%, new average?

A. 27.5

B. 25

C. 26

D. 30

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Correct Answer: Option A

Explanation:
Increased by 10%, average 27.5.

This question belongs to: Maths Average

Question #2

Average income of 10 persons is Rs. 5000. If one leaves, average becomes Rs. 4800. Income of the person who left?

A. 6500

B. 7200

C. 7000

D. 6800

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Correct Answer: Option D

Explanation:
Sum10=50000. Sum9=43200. Left=6800.

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Question #3

The average of all numbers from 1 to 60 divisible by 5 is

A. 35

B. 25

C. 30

D. 32.5

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Correct Answer: Option D

Explanation:
5 to 60. 12 numbers. Average 5*(1+12)/2=32.5.

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