The average of first 5 even numbers is MCQ with Answer and Explanation

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The average of first 5 even numbers is

A. 6

B. 8

C. 7

D. 5

Answer: Option A

Solution (By JKExamLibrary)

2+4+6+8+10=30. Average=6.

This question belongs to: Maths Average

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Question #1

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Average of 5 numbers is 30. If average of first 3 is 28, average of last 3 is 32, then the 3rd number is

A. 32

B. 31

C. 28

D. 30

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Correct Answer: Option D

Explanation:
Sum5=150. Sum1-3=84. Sum3-5=96. 3rd =84 +96 -150=30.

This question belongs to: Maths Average

Question #2

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

A. (x+y)/2

B. x+y

C. xy/(x+y)

D. 2xy/(x+y)

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Correct Answer: Option D

Explanation:
Harmonic mean for equal distances.

This question belongs to: Maths Average

Question #3

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Find the average of the first 6 multiples of 5.

A. 17.5

B. 17

C. 16.5

D. 18

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Correct Answer: Option A

Explanation:
Multiples:5,10,15,20,25,30 sum=105, count=6, avg=17.5.

This question belongs to: Maths Average

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