What is average of all multiples of 7 from 7 to 70? MCQ with Answer and Explanation

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What is average of all multiples of 7 from 7 to 70?

A. 39

B. 35

C. 38

D. 38.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Multiples: 7,14,...,70 (10 numbers). Average=(7+70)/2=38.5.

This question belongs to: Maths Average

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Question #1

Average of 15 numbers 1660. If average of 9 is 1655, average of remaining 6?

A. 1667.5

B. 1668

C. 1665

D. 1670

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Correct Answer: Option A

Explanation:
Sum15=24900. Sum9=14895. Remaining=10005. Average=1667.5.

This question belongs to: Maths Average

Question #2

The average of 180,240,300 is

A. 230

B. 240

C. 235

D. 250

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Correct Answer: Option B

Explanation:
720/3=240.

This question belongs to: Maths Average

Question #3

The average of 1608,2144 is

A. 1880

B. 1876

C. 1870

D. 1860

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Correct Answer: Option B

Explanation:
1876.

This question belongs to: Maths Average

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