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Question

The mean of first 10 whole numbers is:


A

4.5

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B

5.5

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C

6.5

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D

4.5

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Solution

The correct option is D

4.5


The first 10 whole numbers are 0 to 9.

Sum of first n natural numbers = n(n+1)2

So, Sum of first 9 natural numbers = 9(10)2 = 45

Total number of observation = 10

Mean= 4510 = 4.5


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