Average of 825,1100,1375 is MCQ with Answer and Explanation

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Average of 825,1100,1375 is

A. 1100

B. 1095

C. 1110

D. 1090

Answer: Option A

Solution (By JKSSB Mock Tests)

3300/3=1100.

This question belongs to: Maths Average

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Question #1

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The average age of 6 students is 12 years. If the teacher's age is included, the average becomes 15 years. What is the teacher's age?

A. 30

B. 33

C. 36

D. 27

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Correct Answer: Option B

Explanation:
Sum of 6 students' ages = 6×12=72. Sum of 7 persons = 7×15=105. Teacher's age = 105-72=33.

This question belongs to: Maths Average

Question #2

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Average of 345,460,575 is

A. 455

B. 460

C. 450

D. 470

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Correct Answer: Option B

Explanation:
1380/3=460.

This question belongs to: Maths Average

Question #3

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Find the average of the first 10 even numbers.

A. 11.5

B. 12

C. 11

D. 10

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Correct Answer: Option C

Explanation:
Sum of first 10 even numbers = 10×11=110 (since sum = n(n+1) for first n evens? Actually sum = 2+4+...+20 = 2*(1+2+...+10)=2*55=110). Average=110/10=11.

This question belongs to: Maths Average

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