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AP EAMCET20224 Jul 2022Evening ShiftMathematicsProbabilityActual

In a binomial distribution the mean is 15 and variance is 10 . Then parameter n is

Options

  1. A28
  2. B16
  3. C45
  4. D25

Correct answer

C. 45

Step-by-step solution

Given mean, n p = 15 and variance n p 1 - p = 10 ∴   1 - p = 10 15 = 2 3   ⇒ p = 1 3 ∴   n = 15 × 3 = 45

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