Average speed to cover a distance in two equal parts at speeds x and y is MCQ with Answer and Explanation

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Average speed to cover a distance in two equal parts at speeds x and y is

A. xy/(x+y)

B. x+y

C. (x+y)/2

D. 2xy/(x+y)

Answer: Option D

Solution (By JKSSB Mock Tests)

Harmonic mean for equal distances.

This question belongs to: Maths Average

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Question #1

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Average of 10 numbers 2430. If average of 6 is 2425, average of remaining 4?

A. 2436

B. 2435

C. 2440

D. 2437.5

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Correct Answer: Option D

Explanation:
Sum10=24300. Sum6=14550. Remaining=9750. Average=2437.5.

This question belongs to: Maths Average

Question #2

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Average of 8 numbers 2000. If average of 5 is 1995, average of remaining 3?

A. 2008.33

B. 2005

C. 2007

D. 2010

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Correct Answer: Option A

Explanation:
Sum8=16000. Sum5=9975. Remaining=6025. Average≈2008.33.

This question belongs to: Maths Average

Question #3

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Average of 65,130,195 is

A. 120

B. 140

C. 130

D. 125

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Correct Answer: Option C

Explanation:
390/3=130.

This question belongs to: Maths Average

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