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The Arithmetic Mean of 1, 2, 3, ... , N is - Mathematics

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Question

The arithmetic mean of 1, 2, 3, ... , n is

Options

  • \[\frac{n + 1}{2}\]

  • \[\frac{n - 1}{2}\]

  • \[\frac{n}{2}\]

  • \[\frac{n}{2} + 1\]

MCQ
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Solution

Arithmetic mean of 1, 2, 3, ... , n

\[= \frac{1 + 2 + 3 + . . . + n}{n}\]

\[ = \frac{\frac{n\left( n + 1 \right)}{2}}{n}\]

\[ = \frac{n + 1}{2}\]

Hence, the correct option is (a).

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Chapter 15: Statistics - Exercise 15.8 [Page 66]

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RD Sharma Mathematics [English] Class 10
Chapter 15 Statistics
Exercise 15.8 | Q 3 | Page 66
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