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Poisson distribution - class-XII

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Multiple Choice

In a poisson distribution, the variance is $m$ . The sum of terms in odd places in the distribution is 

  1. $e^{-m}$
  2. $e^{-m} \cos \, h \, (m)$
  3. $e^{-m} \sin \, h \, (m)$
  4. $e^{-m} \cot \, h \, (m)$