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We are often blasted with opportunities to "take a chance" to try to win an attractive prize for what seems like very little money and with an apparently good chance of striking lucky (how wrong can you be?). Below are some examples of opportunities to win a holiday for two at a well known resort. It will only cost you the price of a bottle of water to take part.

If you were extravagant enough to "try your luck", which of the following offers the best chance of you winning and how do you know?
Image of the options to win prizes
I think I would prefer the water - especially on a hot summer's day! But you might not agree.


Click here for a poster of this problem.