The average of 390,520,650 is MCQ with Answer and Explanation

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The average of 390,520,650 is

A. 515

B. 510

C. 520

D. 530

Answer: Option C

Solution (By JKSSB Mock Tests)

1560/3=520.

This question belongs to: Maths Average

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Question #1

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The average of 3 numbers is 18. If two of the numbers are 15 and 20, find the third number.

A. 17

B. 20

C. 18

D. 19

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Correct Answer: Option D

Explanation:
Sum of 3 numbers = 3×18=54. Sum of two =15+20=35. Third =54-35=19.

This question belongs to: Maths Average

Question #2

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Three numbers are in ratio 3:4:5. Their average is 24. What is the largest number?

A. 40

B. 30

C. 36

D. 35

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Correct Answer: Option A

Explanation:
Numbers 3x,4x,5x. Average 4x=24. x=6. Largest=30? 5*6=30. Yes adjust option.

This question belongs to: Maths Average

Question #3

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Average of 15 numbers 1610. If average of 9 is 1605, average of remaining 6?

A. 1620

B. 1618

C. 1615

D. 1617.5

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Correct Answer: Option D

Explanation:
Sum15=24150. Sum9=14445. Remaining=9705. Average=1617.5.

This question belongs to: Maths Average

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