Here’s an interactive tutorial
** Best experienced in Full Screen (click the icon in the top right corner before you begin) **
https://www.iorad.com/player/2289563/How-To-Delete-A-Page-Permanently—WordPress–EN-0028-
7 STEPS
1. From your Dashboard, click All Pages
2. Select the pages to delete
3. Click Bulk actions
4. Select Move to Trash
5. Click Apply
6. Your pages are now in the Trash. To delete them permanently, click Trash
7. Click Delete permanently