Average of 30 students 60 marks. If 10 students 70 marks, average of remaining 20? MCQ with Answer and Explanation

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Average of 30 students 60 marks. If 10 students 70 marks, average of remaining 20?

A. 50

B. 55

C. 58

D. 52

Answer: Option B

Solution (By JKExamLibrary)

Total=1800. 10=700. Remaining=1100/20=55.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 4 consecutive odd numbers is 32. What is the smallest number?

A. 29

B. 27

C. 31

D. 33

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Correct Answer: Option A

Explanation:
Numbers are 29,31,33,35. Their average is 32. Smallest number = 29.

This question belongs to: Maths Average

Question #2 Report Error

The average of 1 to 30 is

A. 15

B. 14.5

C. 16

D. 15.5

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Correct Answer: Option D

Explanation:
(30+1)/2=15.5.

This question belongs to: Maths Average

Question #3 Report Error

Average of 15,25,35 is

A. 20

B. 30

C. 25

D. 28

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Correct Answer: Option C

Explanation:
Sum=75. Average=25.

This question belongs to: Maths Average

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