Explain which wire is ground when you have 2 black wires and 1 white wire

Which wire is ground when you have 2 black wires and 1 white wire?

None. Ground is either green or bare.

How do you have two blacks but only one white? Is there a splice in the box?

You may have 2 hots and a shared neutral without a ground. How old is the wiring? Pre 1950?

I have the same issue... 2 switches with 2 blacks leading in and only one white :P Very confused, hopefully someone can help!

See comments above, applies to your question.