If $3$ is the variance of a Poisson distribution,then $P(1 < x < 4) = $
- A$\frac{123}{8} e^{-3}$
- B$3 e^{-\sqrt{3}}$
- C$9 e^{-3}$
- D$\left(\frac{3+\sqrt{3}}{2}\right) e^{-3}$
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