The average of 6 numbers is 15. If average of first 4 is 12, average of last 3 is 18, the 4th number is MCQ with Answer and Explanation

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The average of 6 numbers is 15. If average of first 4 is 12, average of last 3 is 18, the 4th number is

A. 18

B. 12

C. 15

D. 16

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum6=90. Sum1-4=48. Sum4-6=54. 4th=48+54-90=12? Adjust.

This question belongs to: Maths Average

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Average of 735,980,1225 is

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B. 980

C. 970

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Correct Answer: Option B

Explanation:
2940/3=980.

This question belongs to: Maths Average

Question #2

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A. 50

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Explanation:
Total=1800. 10=700. Remaining=1100/20=55.

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Average of 10 numbers 2730. If average of 6 is 2725, average of remaining 4?

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Correct Answer: Option A

Explanation:
Sum10=27300. Sum6=16350. Remaining=10950. Average=2737.5.

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