The average of 5 numbers is 40. If one number is 60, find the average of the remaining 4. MCQ with Answer and Explanation

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The average of 5 numbers is 40. If one number is 60, find the average of the remaining 4.

A. 34

B. 35

C. 36

D. 33.75

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=5×40=200. Remaining sum=200-60=140. Avg=140/4=35.

This question belongs to: Maths Average

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Question #1

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The average marks of 20 students is 75. If a student with 90 marks leaves, what is the new average?

A. 75.0

B. 73.5

C. 74.0

D. 74.21

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Correct Answer: Option D

Explanation:
Sum=20×75=1500. New sum=1500-90=1410. New average=1410/19=74.21.

This question belongs to: Maths Average

Question #2

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The average of 6 consecutive even numbers is 25. What is the largest number?

A. 30

B. 32

C. 28

D. 34

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Correct Answer: Option A

Explanation:
Numbers are 20,22,24,26,28,30. Their average is 25. Largest number = 30.

This question belongs to: Maths Average

Question #3

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The average age of father and son is 30. If father is 45, son's age?

A. 20

B. 15

C. 25

D. 10

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Correct Answer: Option B

Explanation:
Sum =60. Son=60-45=15.

This question belongs to: Maths Average

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