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MHT CET2016MathematicsProbability

If random variable X ∼ B n = 5 , p = 1 3 then P 2 < X < 4 =

Options

  1. A80 243
  2. B40 243
  3. C40 343
  4. D80 343

Correct answer

B. 40 243

Step-by-step solution

Given n = 5 p = 1 3 ∴ q = 2 3 P 2 < x < 4 = P x = 3 = 5 C 3 1 3 3 2 3 2 = 5 × 4 2 × 1 27 × 4 9 = 40 243

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