Average of all multiples of 10 from 10 to 100 is MCQ with Answer and Explanation

Question

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Average of all multiples of 10 from 10 to 100 is

A. 50

B. 45

C. 60

D. 55

Answer: Option D

Solution (By JKSSB Mock Tests)

10 numbers. Average=(10+100)/2=55.

This question belongs to: Maths Average

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Question #1

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Average of 12 numbers 420. If average of 8 is 415, average of remaining 4?

A. 428

B. 430

C. 432

D. 425

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Correct Answer: Option B

Explanation:
Sum12=5040. Sum8=3320. Remaining=1720. Average=430.

This question belongs to: Maths Average

Question #2

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Average of 40 students is 50. If average of 10 is 60, average of remaining 30?

A. 46.67

B. 47

C. 48

D. 45

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Correct Answer: Option A

Explanation:
Total=2000. 10=600. Remaining=1400. 1400/30≈46.67.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1780. If average of 6 is 1775, average of remaining 4?

A. 1786

B. 1790

C. 1787.5

D. 1785

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Correct Answer: Option C

Explanation:
Sum10=17800. Sum6=10650. Remaining=7150. Average=1787.5.

This question belongs to: Maths Average

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