Average of 15 numbers 2060. If average of 9 is 2055, average of remaining 6? MCQ with Answer and Explanation

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Average of 15 numbers 2060. If average of 9 is 2055, average of remaining 6?

A. 2068

B. 2070

C. 2067.5

D. 2065

Answer: Option C

Solution (By JKSSB Mock Tests)

Sum15=30900. Sum9=18495. Remaining=12405. Average=2067.5.

This question belongs to: Maths Average

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Question #1

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The average age of 12 students is 20 years. If the age of the teacher is included, the average increases by 1 year. What is the age of the teacher?

A. 31

B. 33

C. 34

D. 32

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Correct Answer: Option B

Explanation:
Total age of students = 12 × 20 = 240. New average = 21. Total age of 13 people = 13 × 21 = 273. Teacher's age = 273 - 240 = 33 years.

This question belongs to: Maths Average

Question #2

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The average of 1320,1760,2200 is

A. 1760

B. 1755

C. 1770

D. 1750

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Correct Answer: Option A

Explanation:
5280/3=1760.

This question belongs to: Maths Average

Question #3

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Average of 1185,1580,1975 is

A. 1580

B. 1590

C. 1570

D. 1575

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Correct Answer: Option A

Explanation:
4740/3=1580.

This question belongs to: Maths Average

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