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

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

A. 45

B. 50

C. 55

D. 60

Answer: Option C

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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Average of 10 even numbers is 25. What is the largest if they are consecutive?

A. 36

B. 32

C. 34

D. 30

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Correct Answer: Option C

Explanation:
Average middle average of 5th and 6th. Largest =25 +9 =34.

This question belongs to: Maths Average

Question #2

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

A. 15

B. 10

C. 25

D. 20

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Correct Answer: Option A

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

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 15. If each multiplied by 3, new average?

A. 45

B. 5

C. 15

D. 30

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Correct Answer: Option A

Explanation:
Multiplied by 3, average 45.

This question belongs to: Maths Average

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