The mean for counting numbers upto 100 is

56.5

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51.5

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50.5

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Solution

The correct option is D 50.5
$M e a n = \frac{(1 + 2 + 3 \dots \dots + 99 + 100)}{100} = \frac{(1 + 100) + (99 + 2) + . . . . + (50 + 51)}{100} = \frac{101 \times 50}{100} = 50.5$

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