Average of 4 numbers is 50. If three are 40,45,55, fourth is MCQ with Answer and Explanation

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Average of 4 numbers is 50. If three are 40,45,55, fourth is

A. 50

B. 65

C. 55

D. 60

Answer: Option D

Solution (By JKSSB Mock Tests)

Fourth=200-140=60.

This question belongs to: Maths Average

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Question #1

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Average of 15 numbers 1510. If average of 9 is 1505, average of remaining 6?

A. 1520

B. 1517.5

C. 1515

D. 1518

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Correct Answer: Option B

Explanation:
Sum15=22650. Sum9=13545. Remaining=9105. Average=1517.5.

This question belongs to: Maths Average

Question #2

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Average of 9 numbers 590. If average of 6 is 585, average of remaining 3?

A. 595

B. 605

C. 600

D. 598

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Correct Answer: Option C

Explanation:
Sum9=5310. Sum6=3510. Remaining=1800. Average=600.

This question belongs to: Maths Average

Question #3

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Find average of all even numbers from 1 to 50.

A. 26

B. 25

C. 27

D. 24

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Correct Answer: Option A

Explanation:
Even numbers: 2 to 50, 25 numbers. Average = (2+50)/2 = 26.

This question belongs to: Maths Average

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