hard20 pts · first answer countspandastime-series

Rolling mean at the edges

What does this code print?

import pandas as pd

s = pd.Series([10, 20, 30, 40, 50])
print(s.rolling(3).mean().iloc[[1, 4]].tolist())

A.[15.0, 40.0]B.[nan, 40.0]C.[20.0, 40.0]D.[nan, 45.0]

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