"What" is preferred when you don't know how many of something there are or the number is irrelevant. When you're presented with a choice of a limited number of options use "which". for example What city do you live in?
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mitsuwao23Why do you say "what floor" instead of "which floor" when you ask it in a elevator?The only logic in it is that "what" identifies and "which" selects.
Any logical reason?
mitsuo23 Why do you say "what floor" instead of "which floor" when you ask it in a elevator?
Any logical reason?
Thanks,
M