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BITSAT2011MathematicsSequences and SeriesActual

Find the A.M. of the first ten odd numbers.

Options

  1. A10
  2. B20
  3. C15
  4. D25

Correct answer

A. 10

Step-by-step solution

First ten odd numbers are 1, 3, 5, 7, 11,13, (15,17,19 ) respectively. So A.M. ( aligned ( x ) & = 1+3+5+7+9+11+13+15+17+19 10 & = 100 10 =10 aligned )

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