Find average of 11,22,33,...,99. MCQ with Answer and Explanation

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Find average of 11,22,33,...,99.

A. 50

B. 55

C. 45

D. 60

Answer: Option B

Solution (By JKSSB Mock Tests)

11 times (1 to 9). Average 11×5=55.

This question belongs to: Maths Average

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Question #1

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The average of 5 numbers is 33. If each number is decreased by 2, what is the new average?

A. 31

B. 29

C. 33

D. 35

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Correct Answer: Option A

Explanation:
New average =33-2=31.

This question belongs to: Maths Average

Question #2

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Average of 12,24,36,48,60,72 is

A. 40

B. 42

C. 36

D. 45

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Correct Answer: Option B

Explanation:
Sum=252. Average=42.

This question belongs to: Maths Average

Question #3

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

A. 58

B. 52

C. 50

D. 55

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Correct Answer: Option D

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

This question belongs to: Maths Average

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