Dork

A company tests 40 drones a day. In the month of April, 59 failed testing. How many passed testing?

All of you need to calm the heck down- This is a website to help students who are failing in their subjects. I came here because I needed someone to emphasize an answer, but, I guess I won't get an answer. I'm not being mean, but we shouldn't fight..

That was me btw- ^ I