Task: Compute the mean average of the word count of *.txt files in the /testbed directory
Command: find /testbed -name '*.txt' -print0 | xargs -0 wc -w | awk 'END { print $1/(NR-1) }'
Equivalent command: find /testbed -type f -name "*.txt" -exec wc -w {} + | awk '{total = $1} END {print total/(NR-1)}'