It is usually a mixture of alcohol and water in which 40%, by volume is alcohol.
Standard.4.7%/5.0%
do you mean alcohol by volume - then Molson Canadian in 5%
I believe it's 14ml in a liter.
It could mean blood alcohol content is 0.1%.
Let a be the number of ounces of 25% alcohol required. Then, 25a + (30x9) = 28(9 + a) 25a + 270 = 252 + 28a 3a = 18 a = 6 Then 6 ounces of 25% alcohol + 9 ounces of 30% alcohol produces 15 ounces of 28% alcohol.
A serving of wine is five ounces of 13-percent-alcohol wine. If that's what you mean by a drink, you'll be fine. OTOH, if a "drink" of wine is a whole bottle of Cisco (18-percent alcohol--a 12-ounce bottle contains about two ounces of alcohol) you would NOT be fine the next day.
2.8 percent alcohol
Because the concentration of alcohol is lower; you pay the alcohol not the water.
There is no way to calculate that with the information provided. We need to know the volume of each.
Add 5% water
2/3 of 70% and 1/3 of 10%