The coffee machine in our office offers a choice of regular or decaffeinated coffee; black or with one of three sorts of milk (full, semi-skimmed, skimmed); and, for those who want
sweetening, either one or two spoonfuls of sugar or one or two non-sugar sweetening tablets.
How many different kinds of coffee can be made?
A 11
B 24
C 32
D 40
E 48
The answer is D and methods I have seen for this question involve literally writing every single possible kind of coffee and counting them - does anyone know if there is a quicker way to do these kinds of questions?