my friend sold me this ipad and no one knows the apple id or password how do i fix it so i can use it

If your friend is the original owner, have them contact Apple. Apple can remove the ID  if provided the required paperwork to include the original purchase receipt with the serial number on it. 

Request additional support for unlocking your device.    -

You used to be able to take the device, the original purchase receipt with the serial number, and a photo ID to the nearest Apple Store (if it has reopened) and have them remove the ID. This may have changed, so call the store before going to make sure they can help.

Genius Bar Reservation and Apple Support Options - Apple.   -

If your friend isn't the original owner, ask for a refund.

Lazz0754 wrote:

my friend sold me this ipad and no one knows the apple id or password how do i fix it so i can use it

if no one knows it the ipad is useless, not sure why "your friend" would sell you an ipad that isn't going to work.