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Using a Mass Function

Let \(X\) be a random variable with probability mass function

\(p(n) = \frac{1}{c^n}\quad \text{for } n=2,3,4,\cdots\)
and \(p(x)=0\) otherwise.

  1. Find \(c.\)
  2. Compute the probability that \(X\) is even.

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