Alcohol by volume, or ABV, is used to measure the alcohol content of beer, wine, distilled spirits, and other alcoholic beverages. Beers typically fall in the 3.0 to 13.0 percent ABV range, with the majority being 4.0 to 7.0 percent ABV. Some can be weaker or stronger than this.
12 ounces of regular beer, which is usually about 5% alcohol. 5 ounces of wine, which is typically about 12% alcohol.
Weak / light beers are around 3–4 percent, average I would say is 4–6 percent. Then you got stronger beers that are 7 percent + which are usually IPA's or dark beers. If the 5% alcohol are part of a bottle of beer, and there are sufficiently many of them, that may well occur.