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Wed 16 Mar, 2011 07:29 pm
You have decided that each year you are going to visit Europe for vacation. you decide thathere are 12 different cities you'd like to visit. Unfortunately, you only have time to visit 3 cities per year. without repeating that would take 4 years.
How many years would it take if you could repeat cities, but the order you visted the cities doesn't matter? ex 1st year (london. paris, rome) 2nd yr (London, Paris,Dublin)
@phina1970,
Your quiz is not clear enough to answer.
@phina1970,
There are 12C3 combinations ie. (12x11x10)/(1x2x3) combinations = 220 different ways to visit 3 cities each year.
http://en.wikipedia.org/wiki/Combination
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