Hi there, Jahanzeb! Thanks for getting in touch.
Great question. The Events Calendar PRO and WooCommerce Tickets are separate plugins. However, you do not need both in order for the ticketing function to work.
Here are direct links to each plugin
So, the short answer to your question: yes, you only need WooCommerce Tickets to sell tickets. If you want additional functionality for your events calendar like recurring events and additional calendar views, then you’ll want to add PRO on top of that.
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff