What is formula for Correlation of Karl's Pearson (Short-cut Mean Method)? ❥\huge { \mathfrak{\fbox{ \green{Correlation}}}} ​

Question

What is formula for Correlation of Karl's Pearson (Short-cut Mean Method)?

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`\huge { \mathfrak{\fbox{ \green{Correlation}}}}`
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Answer 1

`r = (Σ(X-X)(Y-Y))/(√(Σ(X-X)²) √((Y-Y)²))`

Where, X-mean of X variable

Y - mean of Y variable