Average of 20,30,40,50,60 is MCQ with Answer and Explanation

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Average of 20,30,40,50,60 is

A. 45

B. 40

C. 42

D. 38

Answer: Option B

Solution (By JKSSB Mock Tests)

Sum=200. Average=40.

This question belongs to: Maths Average

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Question #1

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The average of 6 numbers is 25. If 5 numbers average 24, the 6th is

A. 26

B. 30

C. 28

D. 29

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Correct Answer: Option D

Explanation:
6th =150 -120=30? Sum6=150. 5*24=120. 30.

This question belongs to: Maths Average

Question #2

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The average of 3 numbers is 12. If the numbers are in the ratio 1:2:3, find the smallest.

A. 6

B. 10

C. 8

D. 4

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Correct Answer: Option A

Explanation:
Sum=3×12=36. Ratio sum=6. Smallest = (1/6)×36=6.

This question belongs to: Maths Average

Question #3

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The average of 8 numbers is 12. If 4 is added to half of them and 4 subtracted from other half, new average?

A. 14

B. 13

C. 11

D. 12

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Correct Answer: Option D

Explanation:
Net change zero. Average remains 12.

This question belongs to: Maths Average

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