A challenge

[bluemoon1]

I've just been set a poser I can't work out as I am more into words than maths

If a pint of beer = 4% ABV

what would be the equivalent ABV = if a 50ml shot of whiskey was topped up with water to a pint

Many thanks

ps an explanation would be very much appreciated

sorry ABV = alcohol by volume

[Gizmonster]

Gonna have to make an assumption as there's not enough info to answer the question - I'll assume that the whisy is 40% ABV

40% of 50ml = 20ml
i.e. the whisky is effectively made up of 20ml pure (100%) alcohol and 30ml neutral liquid.
Top it up to a pint (568ml).
The pint now contains 20ml of pure alcohol and 548ml of neutral solution.
Therefore the % ABV = 20/568 x 100 = 3.52%

...... I think lol :)

[Celticv11]

3.52% i think. 50 ml of whisky at 40% abv =20ml of alcohol. 1 pint = 568 ml. Divide by 20 =28.4. 100 divided by 28.4. = 3.52

[bluemoon1]

Thank You both