Selecting n random files from one directory and copying them to another folder + other files with same same, but different filetype

I have two directories, lets call them **X** and **Y** Within them I have 100k+ files, .jpg files in **X** and .txt files in **Y** I want to randomly select **N** files from **X** and copy to folder **Z** This should be manageable using find + shuffle. I then want to find all of the files in **Y** with the same names of the files that were copied to **Z**, but they are .txt files and copy them to directory **W** To visualize: N files from **X** >> **Z** Same N files from **Y** >> **W** How would I go about doing that?