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What is the arithmetic mean of 50 terms of an AP with first term 4 and common difference 4 ?

Options

  1. A50
  2. B51
  3. C100
  4. D102

Correct answer

D. 102

Step-by-step solution

Given a =4, ~d =4 and n =50 hence S _ n = n 2 [2 a +( x -1) d ] aligned & = 50 2 [2 4+49 4] & =50[4+98] & Now X = S_n ~h = 50 102 50 =102 aligned

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