Fix TypeError in Step 6 by adding numeric_only=True to groupby.mean()

[Utkarsh-Karambhe]

Issue

In 03_Grouping/Alcohol_Consumption/Exercise_with_solutions.ipynb, Step 6 (drinks.groupby('continent').mean()) raises a TypeError in modern pandas versions (e.g., 2.x) due to attempting to compute the mean of the non-numeric country column.

Fix

Updated the code to drinks.groupby('continent').mean(numeric_only=True) to exclude non-numeric columns, ensuring compatibility with pandas 2.x.

Impact

This fixes the error and aligns the solution with current pandas behavior, improving the exercise for learners.