Alternative Equation Formats

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MathML

\begin{array}{rcl} {\bar{P}}_{x} & = & (\sum_{i = 1}^{n_{x}} P (X_{i})) / n_{x} \\ {\bar{P}}_{y} & = & (\sum_{j = 1}^{n_{y}} P (Y_{j})) / n_{y} \end{array}

Math Rendered as SVG

Math as LaTeX Source

\begin{eqnarray*} \bar{P}_ x & = & \left( \sum _{i=1}^{n_ x} P(X_ i) \right) \, / \, n_ x \\[0.05in] \bar{P}_ y & = & \left( \sum _{j=1}^{n_ y} P(Y_ j) \right) \, / \, n_ y \end{eqnarray*}