Average of 12 numbers 75. If average of 7 is 70, average of remaining 5? MCQ with Answer and Explanation

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Average of 12 numbers 75. If average of 7 is 70, average of remaining 5?

A. 85

B. 82

C. 78

D. 80

Answer: Option B

Solution (By JKExamLibrary)

Sum12=900. Sum7=490. Remaining=410. Average=82.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 42,56,70 is

A. 56

B. 50

C. 55

D. 60

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Correct Answer: Option A

Explanation:
168/3=56.

This question belongs to: Maths Average

Question #2 Report Error

Average of 40 numbers 30. If 10 numbers average 40, average of remaining 30?

A. 27

B. 28

C. 25

D. 26.67

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Correct Answer: Option D

Explanation:
Total=1200. 10=400. Remaining=800/30≈26.67.

This question belongs to: Maths Average

Question #3 Report Error

The average of 10 numbers is 25. If one number is removed, the average becomes 23. What is the removed number?

A. 43

B. 40

C. 38

D. 45

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Correct Answer: Option A

Explanation:
Sum of 10 =250. Sum of 9 =9×23=207. Removed number =250-207=43.

This question belongs to: Maths Average

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