"An RV" or "a RV"? [duplicate]

Solution 1:

This depends entirely on how you expect people to read the letters RV. If you expect them to say "random variable" every time, then use a RV. If you expect that they'll pronounce the letter names, use an RV. Personally, I would lean towards the latter.

That's because the choice of a or an is determined entirely by pronunciation.

Solution 2:

When someone reads "RV" aloud, they will say "Arr-Vee", not "random variable"; so 'an' is correct.

Solution 3:

"An RV". It's whether it would be pronounced with a vowel sound that controls, and what you would actually say rather than the expansion.