What are chances of getting mouth cancer for someone who does not smoke and drink?

Very low. You have a very low chance of getting mouth cancer, certainly lower than that of those who smoke, but that does not mean that it's impossible. If you are concerned that you might have mouth cancer then you should visit an oral surgeon and they can tell you for sure.
Minimal. Historically alcohol and tobacco are the leading causes of oral cancer. However, a few strains of hpv, a common virus, can cause oral cancer as well and are becoming much more prevalent. Your dentist should evaulate you yearly for oral cancer. Caught in the earliest stages, oral cancer can be treated quickly and easily.

Related Questions

What's the chances of mouth cancer if you only smoke or drink on occasion like 10 times a year I'm 22?

Still at risk. The chances of getting mouth cancer is still significant even though use tobacco occasionally. You are still getting more than enough exposure to cancer causing substances. At those infrequent times why do it at all, and take whatever chance it may be.. Read more...
Unlikely. Unlikely. Oral cancer mostly related to frequent long term smoking and drinking. Read more...

Can you get mouth cancer from drinking out of the same cup?

No, but. No. See oral surgeon or ENT doc if you have any of these symptoms: Persistent mouth sore, persistent mouth pain, a lump or thickening in the cheek, a white/red patch on the gums, tongue, tonsil, or lining of the mouth, a sore throat, hoarseness or feeling that something is caught in the throat that does not go away, difficulty swallowing/chewing. Read more...

Could you tell me what are chances of mouth cancer with no tabacoo at all or drinking?

Very low. Smoking, chewing tobacco and drinking alcohol can lead to oral cancer. A recent study showed that over 90% of oral cancers were associated with combining heavy smoking and heavy drinking while a virus is also suspected in oral cancer, the risk is very low in non drinkers and non smokers. Read more...