Deleted All Photos on iPad album?

I am trying to delete a bunch of albums in my moms iPad on iOS 7.1. I am not an iOS user. Please help me out.

But there does not seem to be any option to do a "Select All" and hit the Delete button. I have to select each photo individually and then hit Delete? There are like thousands of photos and its driving me up the wall. I am surely missing something here.

Thanks in advance