The average of 35 numbers is 25. If 5 numbers average 30 are included, new average of 40? MCQ with Answer and Explanation

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The average of 35 numbers is 25. If 5 numbers average 30 are included, new average of 40?

A. 24

B. 25

C. 25.625

D. 26

Answer: Option C

Solution (By JKExamLibrary)

Total35=875. Added=150. Total1025/40=25.625.

This question belongs to: Maths Average

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Question #1 Report Error

Average of 12 numbers 2020. If average of 8 is 2015, average of remaining 4?

A. 2025

B. 2028

C. 2032

D. 2030

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Correct Answer: Option D

Explanation:
Sum12=24240. Sum8=16120. Remaining=8120. Average=2030.

This question belongs to: Maths Average

Question #2 Report Error

Average marks of boys 60, girls 70, total average 65. Ratio boys:girls?

A. 1:2

B. 3:1

C. 1:1

D. 2:1

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Correct Answer: Option C

Explanation:
Let b,g. 60b +70g =65(b+g). 5g=5b. b=g.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 numbers is 40. If each number is multiplied by 2, what is the new average?

A. 60

B. 80

C. 40

D. 20

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Correct Answer: Option B

Explanation:
If each number is multiplied by a constant, average is also multiplied by the same. New average = 40 × 2 = 80.

This question belongs to: Maths Average

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