The average of 4 numbers is 20. If three numbers are 15,20,25, fourth is MCQ with Answer and Explanation

The average of 4 numbers is 20. If three numbers are 15,20,25, fourth is
A. 22
B. 20
C. 25
D. 18
Answer: Option B
Solution (By JKSSB Mock Tests)
Fourth=80-60=20.

This question belongs to: Maths Average
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Question #1
Average of 12 numbers 770. If average of 8 is 765, average of remaining 4?
A. 778
B. 782
C. 780
D. 775

Correct Answer: Option C


Explanation:
Sum12=9240. Sum8=6120. Remaining=3120. Average=780.

This question belongs to: Maths Average
Question #2
Average of 9 numbers 1840. If average of 6 is 1835, average of remaining 3?
A. 1855
B. 1848
C. 1850
D. 1845

Correct Answer: Option C


Explanation:
Sum9=16560. Sum6=11010. Remaining=5550. Average=1850.

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Question #3
Average of 12 numbers 1420. If average of 8 is 1415, average of remaining 4?
A. 1425
B. 1428
C. 1432
D. 1430

Correct Answer: Option D


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

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