Average of 21,42,63 is MCQ with Answer and Explanation

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Average of 21,42,63 is

A. 42

B. 40

C. 35

D. 45

Answer: Option A

Solution (By JKSSB Mock Tests)

126/3=42.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 510. If average of 9 is 505, average of remaining 6?

A. 520

B. 517.5

C. 518

D. 515

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Correct Answer: Option B

Explanation:
Sum15=7650. Sum9=4545. Remaining=3105. Average=517.5.

This question belongs to: Maths Average

Question #2

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The average of 210,280,350 is

A. 275

B. 280

C. 290

D. 270

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Correct Answer: Option B

Explanation:
840/3=280.

This question belongs to: Maths Average

Question #3

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Average of 4 consecutive numbers is 49.5. Largest number?

A. 49

B. 51

C. 52

D. 50

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Correct Answer: Option B

Explanation:
Average middle of 2nd 3rd 49.5. Largest=49.5+1.5=51.

This question belongs to: Maths Average

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