Question

Can someone explain to me when to use this equation?

Answer 1

I do know that its an overlapping event formula.

Answer 2

These are some problems from my discrete math textbook about the inclusion-exclusion principle. I'm pretty sure that's what this is.

Answer 3

thanks!

Answer 4

So you would add whatever the umbers are for a and b and subtract whatever is in the middle?

Answer 5

yes

Answer 6

Awesome thanks!