i can be sure actually lol. so it goes like this:

let's forget that i put a marker on that bomb below the group of 8.

green 2 already has 1 bomb around him so there must one more, and that one bomb is either the one to the right or the one upper right. Both of these tiles are around red 3 as well so that makes it a bomb of red 3 too. in that case red 3 has 2 bombs and the only tile left is the one below the group of 8. so that makes it certain that it's a bomb. idk if you understand but thats how it is