Direct vs Indirect Quotes

I wanted to get clarification on how if the test uses both direct or indirect quotes. Also, I want to make sure I have them down. (a/b) = 1.5 means that 1.5 units of a buys 1 unit of b (a:b) = 1.5, means that 1.5 units of b buys 1 unit of a, if a is foreign currency it is a direct quote, if b is foreign currency it is indirect Is this correct? Are there any other ways that they might present a quote that I didn’t list?

That’s correct.

Just a question that goes along with this… The main CFAI reading made it sound like they’ll be using A:B going foward… Does this mean that we shouldn’t see any A/B?