Average of 21, 28, 35, 42 is MCQ with Answer and Explanation

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Average of 21, 28, 35, 42 is

A. 33

B. 31.5

C. 32

D. 30

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=126. Average=31.5.

This question belongs to: Maths Average

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Question #1

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The average of 8 numbers is 40. If one number is 20, find the average of the remaining 7.

A. 42.86

B. 41.5

C. 43

D. 42

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Correct Answer: Option A

Explanation:
Sum=8×40=320. Remaining sum=320-20=300. Avg=300/7=42.86.

This question belongs to: Maths Average

Question #2

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Average of 9 numbers 1490. If average of 6 is 1485, average of remaining 3?

A. 1498

B. 1500

C. 1505

D. 1495

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Correct Answer: Option B

Explanation:
Sum9=13410. Sum6=8910. Remaining=4500. Average=1500.

This question belongs to: Maths Average

Question #3

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The average of 1320,1760,2200 is

A. 1760

B. 1750

C. 1770

D. 1755

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Correct Answer: Option A

Explanation:
5280/3=1760.

This question belongs to: Maths Average

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